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Choppy video on Youtube

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  Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-06 18:50 +0200
    Re: Choppy video on Youtube Ric Moore <wayward4now@gmail.com> - 2016-04-06 20:20 +0200
      Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-06 20:40 +0200
      Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-07 14:20 +0200
        Re: Choppy video on Youtube Lisi Reisz <lisi.reisz@gmail.com> - 2016-04-07 15:10 +0200
          Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-07 15:20 +0200
            Re: Choppy video on Youtube Lisi Reisz <lisi.reisz@gmail.com> - 2016-04-07 15:40 +0200
    Re: Choppy video on Youtube Felix Miata <mrmazda@earthlink.net> - 2016-04-06 21:20 +0200
      Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-07 14:50 +0200
    Re: Choppy video on Youtube Patrick Bartek <nemommxiv@gmail.com> - 2016-04-07 02:40 +0200
      Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-07 15:10 +0200
      Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-09 19:20 +0200
    Re: Choppy video on Youtube Sven Arvidsson <sa@whiz.se> - 2016-04-07 16:30 +0200
      Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-07 17:10 +0200
        Re: Choppy video on Youtube Lisi Reisz <lisi.reisz@gmail.com> - 2016-04-07 17:20 +0200
        Re: Choppy video on Youtube Felix Miata <mrmazda@earthlink.net> - 2016-04-07 19:20 +0200
          Re: Choppy video on Youtube Harris Paltrowitz <harris1nyc@gmail.com> - 2016-04-07 23:10 +0200

#166479 — Choppy video on Youtube

[Multipart message — attachments visible in raw view] — view raw

Hi all,

First, I'm asking for help on this list because I've observed this to be 
a very august group :) and I'm actually a bit in awe to be in the 
presence of Debian developers...  I've only been using Debian for a few 
weeks -- I'm not new to Linux or Unix, although I'm still a relative 
beginner.

Here's my problem -- when I stream certain videos on Youtube, I 
consistently get choppy playback performance, whereby the video freezes 
and restarts randomly, with the audio getting out of sync from that 
point forward.  The problem is NOT due to the video still being 
downloaded -- I know this because the progress bar shows that the 
download is way ahead of my viewing progress.

Here are my specs:

- Debian Jessie 32-bit (I had installed 8.3 and subsequently ran some 
updates, but I don't know how to check to see if I'm up to 8.4)
- Gnome 3
- Firefox 45.0.1
- Flash is NOT installed
- flashplugin-nonfree is NOT installed
- neither gnash nor pepper are installed
- example of a video that gets choppy: 
https://www.youtube.com/watch?v=R6Tok9KUjTw (the problem seems to start 
during the "man on the street" segments)
- When the choppiness is happening, System Monitor tells me that one of 
my four CPUs is maxing out at 100% at least half the time

Hardware:
​- Dell Inspiron 15 3000 Series (Intel(R)) - 3551
- Intel Pentium CPU N3540 @ 2.16GHz x 4 (2M Cache, up to 2.66 GHz)
- 4GB Single Channel DDR3L 1600MHz (4GBx1)
- Graphics: Intel Bay Trail x86/MMX/SSE2

I would love to receive help from this list...  thanks much much in advance!

-Harris

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#166481

On 04/06/2016 12:45 PM, Harris Paltrowitz wrote:

> - Graphics: Intel Bay Trail x86/MMX/SSE2
>
> I would love to receive help from this list...  thanks much much in advance!

Do you have your Intel video driver installed?? Video played back here 
just fine using HTML5. Ric
-- 
My father, Victor Moore (Vic) used to say:
"There are two Great Sins in the world...
..the Sin of Ignorance, and the Sin of Stupidity.
Only the former may be overcome." R.I.P. Dad.
http://linuxcounter.net/user/44256.html

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#166482

On Apr 6, 2016, at 2:16 PM, Ric Moore <wayward4now@gmail.com> wrote:

On 04/06/2016 12:45 PM, Harris Paltrowitz wrote:

> - Graphics: Intel Bay Trail x86/MMX/SSE2
> 
> I would love to receive help from this list...  thanks much much in advance!

Do you have your Intel video driver installed?? Ric
-- 
Hey Ric, can you tell me how to check this? thanks

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#166499

[Multipart message — attachments visible in raw view] — view raw

On 04/06/2016 02:16 PM, Ric Moore wrote:
> On 04/06/2016 12:45 PM, Harris Paltrowitz wrote:
>
>> - Graphics: Intel Bay Trail x86/MMX/SSE2
>>
>> I would love to receive help from this list...  thanks much much in 
>> advance!
>
> Do you have your Intel video driver installed?? Video played back here 
> just fine using HTML5. Ric

Okay, it looks like I was able to figure out how to detect my video 
driver, using the following command:​
lspci -nnk | grep -i vga -A3

my output is:
​
00:02.0 VGA compatible controller [0300]: Intel Corporation Atom 
Processor Z36xxx/Z37xxx Series Graphics & Display [8086:0f31] (rev 0e)
     Subsystem: Dell Device [1028:06ab]
     Kernel driver in use: i915
00:13.0 SATA controller [0106]: Intel Corporation Device [8086:0f23] 
(rev 0e)

I hope this helps... thanks in advance gang!

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#166502

On Thursday 07 April 2016 13:12:45 Harris Paltrowitz wrote:
> Intel Corporation Atom
> Processor Z36xxx/Z37xxx Series Graphics

What kernel have you got?

$ uname -v

I have found this
https://wiki.debian.org/InstallingDebianOn/Lenovo/s20-30
which seems to have same graphics, and "which kernel" seems to be the place to 
start.

Sorry if you have already said.

Lisi

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#166504

On 04/07/2016 09:04 AM, Lisi Reisz wrote:
> On Thursday 07 April 2016 13:12:45 Harris Paltrowitz wrote:
>> Intel Corporation Atom
>> Processor Z36xxx/Z37xxx Series Graphics
> What kernel have you got?
>
> $ uname -v

My output from that command is:

#1 SMP Debian 3.16.7-ckt25-1 (2016-03-06)


> I have found this
> https://wiki.debian.org/InstallingDebianOn/Lenovo/s20-30
> which seems to have same graphics, and "which kernel" seems to be the place to
> start.
>
> Sorry if you have already said.
>
> Lisi

Thank you Lisi, but what exactly should I do with the info on this page? :-)

Harris

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#166505

On Thursday 07 April 2016 14:14:15 Harris Paltrowitz wrote:
> On 04/07/2016 09:04 AM, Lisi Reisz wrote:
> > On Thursday 07 April 2016 13:12:45 Harris Paltrowitz wrote:
> >> Intel Corporation Atom
> >> Processor Z36xxx/Z37xxx Series Graphics
> >
> > What kernel have you got?
> >
> > $ uname -v
>
> My output from that command is:
>
> #1 SMP Debian 3.16.7-ckt25-1 (2016-03-06)
>
> > I have found this
> > https://wiki.debian.org/InstallingDebianOn/Lenovo/s20-30
> > which seems to have same graphics, and "which kernel" seems to be the
> > place to start.
> >
> > Sorry if you have already said.
> >
> > Lisi
>
> Thank you Lisi, but what exactly should I do with the info on this page?
> :-)
>
> Harris

Now I have the info I'll try to see if I can help - I got that far and 
thought:  If it is something as simple as too old a kernel we're home and 
dry.

You may get the full answer from someone else faster than you will from me - I 
am chasing my vendor for enough details about which version of my motherboard 
I have to enable me to flash it.  But I _will_ look into it.

I'll also try to tell you what I did!!  Here's why I started by asking about 
your kernel:
"This (the problem with the display) was resolved by upgrading to kernel 
3.16."

You have kernel 3.16, so that is no help.

Lisi

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#166483

Harris Paltrowitz composed on 2016-04-06 12:45 (UTC-0400):

> First, I'm asking for help on this list because I've observed this to be
> a very august group :) and I'm actually a bit in awe to be in the
> presence of Debian developers...  I've only been using Debian for a few
> weeks -- I'm not new to Linux or Unix, although I'm still a relative
> beginner.

> Here's my problem -- when I stream certain videos on Youtube, I
> consistently get choppy playback performance, whereby the video freezes
> and restarts randomly, with the audio getting out of sync from that
> point forward.  The problem is NOT due to the video still being
> downloaded -- I know this because the progress bar shows that the
> download is way ahead of my viewing progress.

> Here are my specs:

> - Debian Jessie 32-bit (I had installed 8.3 and subsequently ran some
> updates, but I don't know how to check to see if I'm up to 8.4)
> - Gnome 3
> - Firefox 45.0.1
> - Flash is NOT installed
> - flashplugin-nonfree is NOT installed
> - neither gnash nor pepper are installed
> - example of a video that gets choppy:
> https://www.youtube.com/watch?v=R6Tok9KUjTw (the problem seems to start
> during the "man on the street" segments)
> - When the choppiness is happening, System Monitor tells me that one of
> my four CPUs is maxing out at 100% at least half the time

> Hardware:
> ​- Dell Inspiron 15 3000 Series (Intel(R)) - 3551
> - Intel Pentium CPU N3540 @ 2.16GHz x 4 (2M Cache, up to 2.66 GHz)
> - 4GB Single Channel DDR3L 1600MHz (4GBx1)
> - Graphics: Intel Bay Trail x86/MMX/SSE2

> I would love to receive help from this list...  thanks much much in advance!

I don't see Bay Trail on https://en.wikipedia.org/wiki/List_of_Intel_chipsets 
which likely means your laptop's construction design predates Jessie's 
original release a year ago. Maybe Stretch has support for it? Maybe 
switching between modesetting and intel X driver is what you need, depending 
on which is in use now. /var/log/Xorg.0.log will say which video driver is in 
use. If it's not intel or modesetting, X is running on an inferior fallback 
driver.

https://www.reddit.com/r/archlinux/comments/4cojj9/it_is_probably_time_to_ditch_xf86videointel/ 
could provide some insight on driver selection, but you still may need Xorg 
or video driver or both from unstable.
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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#166501

On 04/06/2016 03:11 PM, Felix Miata wrote:
> I don't see Bay Trail on 
> https://en.wikipedia.org/wiki/List_of_Intel_chipsets which likely 
> means your laptop's construction design predates Jessie's original 
> release a year ago. Maybe Stretch has support for it? 
I unfortunately don't know how to determine this...

> Maybe switching between modesetting and intel X driver is what you 
> need, depending on which is in use now. /var/log/Xorg.0.log will say 
> which video driver is in use. If it's not intel or modesetting, X is 
> running on an inferior fallback driver.
That log file is huge, but the relevant section appears to be:

[    22.881] (II) Module ABI versions:
[    22.881]     X.Org ANSI C Emulation: 0.4
[    22.881]     X.Org Video Driver: 18.0
[    22.881]     X.Org XInput driver : 21.0
[    22.881]     X.Org Server Extension : 8.0
[    22.883] (II) xfree86: Adding drm device (/dev/dri/card0)
[    22.887] (--) PCI:*(0:0:2:0) 8086:0f31:1028:06ab rev 14, Mem @ 
0xd0000000/4194304, 0xc0000000/268435456, I/O @ 0x0000f080/8
[    22.902] (II) LoadModule: "glx"
[    22.905] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so
[    23.383] (II) Module glx: vendor="X.Org Foundation"
[    23.383]     compiled for 1.16.4, module version = 1.0.0
[    23.383]     ABI class: X.Org Server Extension, version 8.0
[    23.383] (==) AIGLX enabled
[    23.383] (==) Matched intel as autoconfigured driver 0
[    23.383] (==) Matched intel as autoconfigured driver 1
[    23.384] (==) Matched modesetting as autoconfigured driver 2
[    23.384] (==) Matched fbdev as autoconfigured driver 3
[    23.384] (==) Matched vesa as autoconfigured driver 4
[    23.384] (==) Assigned the driver to the xf86ConfigLayout
[    23.384] (II) LoadModule: "intel"
[    23.409] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so
[    23.464] (II) Module intel: vendor="X.Org Foundation"
[    23.465]     compiled for 1.15.99.904, module version = 2.21.15
[    23.465]     Module class: X.Org Video Driver
[    23.465]     ABI class: X.Org Video Driver, version 18.0
[    23.465] (II) LoadModule: "modesetting"
[    23.467] (II) Loading /usr/lib/xorg/modules/drivers/modesetting_drv.so
[    23.496] (II) Module modesetting: vendor="X.Org Foundation"
[    23.496]     compiled for 1.16.4, module version = 0.9.0
[    23.496]     Module class: X.Org Video Driver
[    23.497]     ABI class: X.Org Video Driver, version 18.0
[    23.497] (II) LoadModule: "fbdev"
[    23.498] (II) Loading /usr/lib/xorg/modules/drivers/fbdev_drv.so
[    23.502] (II) Module fbdev: vendor="X.Org Foundation"
[    23.503]     compiled for 1.15.99.904, module version = 0.4.4
[    23.503]     Module class: X.Org Video Driver
[    23.503]     ABI class: X.Org Video Driver, version 18.0
[    23.503] (II) LoadModule: "vesa"
[    23.505] (II) Loading /usr/lib/xorg/modules/drivers/vesa_drv.so
[    23.521] (II) Module vesa: vendor="X.Org Foundation"
[    23.521]     compiled for 1.15.99.904, module version = 2.3.3
[    23.521]     Module class: X.Org Video Driver
[    23.521]     ABI class: X.Org Video Driver, version 18.0
[    23.521] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:
     i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G,
     915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM,
     Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33,
     GM45, 4 Series, G45/G43, Q45/Q43, G41, B43, HD Graphics,
     HD Graphics 2000, HD Graphics 3000, HD Graphics 2500,
     HD Graphics 4000, HD Graphics P4000, HD Graphics 4600,
     HD Graphics 5000, HD Graphics P4600/P4700, Iris(TM) Graphics 5100,
     HD Graphics 4400, HD Graphics 4200, Iris(TM) Pro Graphics 5200
[    23.530] (II) modesetting: Driver for Modesetting Kernel Drivers: kms
[    23.530] (II) FBDEV: driver for framebuffer: fbdev
[    23.530] (II) VESA: driver for VESA chipsets: vesa
[    23.530] (++) using VT number 7

[    23.567] (WW) Falling back to old probe method for modesetting
[    23.567] (WW) Falling back to old probe method for fbdev
[    23.568] (II) Loading sub module "fbdevhw"
[    23.568] (II) LoadModule: "fbdevhw"
[    23.568] (II) Loading /usr/lib/xorg/modules/libfbdevhw.so
[    23.583] (II) Module fbdevhw: vendor="X.Org Foundation"
[    23.583]     compiled for 1.16.4, module version = 0.0.2
[    23.584]     ABI class: X.Org Video Driver, version 18.0
[    23.584] (WW) Falling back to old probe method for vesa
[    23.585] (II) intel(0): Creating default Display subsection in 
Screen section
     "Default Screen Section" for depth/fbbpp 24/32
[    23.585] (==) intel(0): Depth 24, (--) framebuffer bpp 32
[    23.585] (==) intel(0): RGB weight 888
[    23.585] (==) intel(0): Default visual is TrueColor
[    23.585] (--) intel(0): gen7 engineering sample
[    23.586] (**) intel(0): Relaxed fencing enabled
[    23.586] (**) intel(0): Wait on SwapBuffers? enabled
[    23.586] (**) intel(0): Triple buffering? enabled
[    23.586] (**) intel(0): Framebuffer tiled
[    23.586] (**) intel(0): Pixmaps tiled
[    23.587] (**) intel(0): 3D buffers tiled
[    23.587] (**) intel(0): SwapBuffers wait enabled
[    23.587] (==) intel(0): video overlay key set to 0x101fe
[    23.590] (II) intel(0): Output eDP1 has no monitor section
[    23.590] (--) intel(0): found backlight control interface 
/sys/class/backlight/intel_backlight
[    23.592] (II) intel(0): Output HDMI1 has no monitor section
[    23.592] (II) intel(0): Output DP1 has no monitor section
[    23.594] (II) intel(0): Output HDMI2 has no monitor section
[    23.596] (II) intel(0): EDID for output eDP1
[    23.597] (II) intel(0): Manufacturer: BOE  Model: 615  Serial#: 0
[    23.597] (II) intel(0): Year: 2014  Week: 1
[    23.597] (II) intel(0): EDID Version: 1.4
[    23.597] (II) intel(0): Digital Display Input
[    23.597] (II) intel(0): 6 bits per channel
[    23.597] (II) intel(0): Digital interface is DisplayPort
[    23.597] (II) intel(0): Max Image Size [cm]: horiz.: 34  vert.: 19
[    23.597] (II) intel(0): Gamma: 2.20
[    23.598] (II) intel(0): No DPMS capabilities specified
[    23.598] (II) intel(0): Supported color encodings: RGB 4:4:4 YCrCb 
4:4:4
[    23.598] (II) intel(0): First detailed timing is preferred mode
[    23.598] (II) intel(0): Preferred mode is native pixel format and 
refresh rate
[    23.598] (II) intel(0): redX: 0.585 redY: 0.347   greenX: 0.334 
greenY: 0.569
[    23.598] (II) intel(0): blueX: 0.164 blueY: 0.117   whiteX: 0.312 
whiteY: 0.339
[    23.598] (II) intel(0): Manufacturer's mask: 0
[    23.599] (II) intel(0): Supported detailed timing:
[    23.599] (II) intel(0): clock: 70.1 MHz   Image Size:  309 x 173 mm
[    23.599] (II) intel(0): h_active: 1366  h_sync: 1414  h_sync_end 
1446 h_blank_end 1485 h_border: 0
[    23.599] (II) intel(0): v_active: 768  v_sync: 771  v_sync_end 777 
v_blanking: 787 v_border: 0
[    23.599] (II) intel(0): Supported detailed timing:
[    23.599] (II) intel(0): clock: 60.5 MHz   Image Size:  309 x 173 mm
[    23.599] (II) intel(0): h_active: 1366  h_sync: 1414  h_sync_end 
1446 h_blank_end 1551 h_border: 0
[    23.600] (II) intel(0): v_active: 768  v_sync: 771  v_sync_end 777 
v_blanking: 813 v_border: 0

>
> https://www.reddit.com/r/archlinux/comments/4cojj9/it_is_probably_time_to_ditch_xf86videointel/ 
> could provide some insight on driver selection, but you still may need 
> Xorg or video driver or both from unstable.

I'm unfortunately at a loss to understand your message here...  I 
understand what you mean by using things from unstable (I've read the 
Debian FAQ section on stable/unstable etc.) but as I'm relatively new, 
it's still a bit cryptic to me.

I chose to use Debian because Ubuntu failed me twice -- both times, the 
"Automatic Update" failed miserably and left me with an unusable system, 
on two different laptops.  So I decided to go back to the source of 
Ubuntu, hence why I'm here...  I'll do my best to follow along with the 
advice given here.

Thanks again.
Harris

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#166492

On Wed, 06 Apr 2016, Harris Paltrowitz wrote:

> Hi all,
> 
> First, I'm asking for help on this list because I've observed this to
> be a very august group :) and I'm actually a bit in awe to be in the 
> presence of Debian developers...  I've only been using Debian for a
> few weeks -- I'm not new to Linux or Unix, although I'm still a
> relative beginner.
> 
> Here's my problem -- when I stream certain videos on Youtube, I 
> consistently get choppy playback performance, whereby the video
> freezes and restarts randomly, with the audio getting out of sync
> from that point forward.  The problem is NOT due to the video still
> being downloaded -- I know this because the progress bar shows that
> the download is way ahead of my viewing progress.
> 
> Here are my specs:
> 
> - Debian Jessie 32-bit (I had installed 8.3 and subsequently ran some 
> updates, but I don't know how to check to see if I'm up to 8.4)
> - Gnome 3
> - Firefox 45.0.1
> - Flash is NOT installed
> - flashplugin-nonfree is NOT installed
> - neither gnash nor pepper are installed
> - example of a video that gets choppy: 
> https://www.youtube.com/watch?v=R6Tok9KUjTw (the problem seems to
> start during the "man on the street" segments)
> - When the choppiness is happening, System Monitor tells me that one
> of my four CPUs is maxing out at 100% at least half the time
> 
> Hardware:
> ​- Dell Inspiron 15 3000 Series (Intel(R)) - 3551
> - Intel Pentium CPU N3540 @ 2.16GHz x 4 (2M Cache, up to 2.66 GHz)
> - 4GB Single Channel DDR3L 1600MHz (4GBx1)
> - Graphics: Intel Bay Trail x86/MMX/SSE2
> 
> I would love to receive help from this list...  thanks much much in
> advance!

Why did you install the 32-bit version?  You have a 64-bit system,
right?

A few months ago, I installed Jessie 32-bit LXDE desktop in VirtualBox
on a 64-bit host (Wheezy 64-bit) to test video streaming from different
sources. Videos ran awful like what you describe.  I reinstalled, but
the 64-bit version.  Videos streamed perfectly.  Everything else
remained the same.  I just let the installer do its thing.

Why GNOME3?  Could be it's the problem.  I've never been able to try it
on my systems.  It won't run.  My plain vanilla graphics cards just
don't have support for it. I get the "fallback" desktop. Also, GNOME3
has become a bloated resource hog, IMHO.

So, first try the 64-bit version with GANOME3, and if that doesn't
solve the problem look to a lightweight desktop like LXDE or XFCE, or
just a window manager.

And, of course, check you've got the latest video driver installed.

B  

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#166503

On 04/06/2016 08:31 PM, Patrick Bartek wrote:
> Why did you install the 32-bit version? You have a 64-bit system, right? 
Well from what I had read, I saw my RAM as borderline (4gb) and I read 
something stating that with a low-end CPU, things should run faster with 
the 32-bit version.

> A few months ago, I installed Jessie 32-bit LXDE desktop in VirtualBox 
> on a 64-bit host (Wheezy 64-bit) to test video streaming from 
> different sources. Videos ran awful like what you describe. I 
> reinstalled, but the 64-bit version. Videos streamed perfectly. 
> Everything else remained the same. I just let the installer do its thing. 
I may very well try this!  I don't mind doing a full reinstall, so this 
may be my next step.

> Why GNOME3? Could be it's the problem. I've never been able to try it 
> on my systems. It won't run. My plain vanilla graphics cards just 
> don't have support for it. I get the "fallback" desktop. Also, GNOME3 
> has become a bloated resource hog, IMHO. So, first try the 64-bit 
> version with GANOME3, and if that doesn't solve the problem look to a 
> lightweight desktop like LXDE or XFCE, or just a window manager. And, 
> of course, check you've got the latest video driver installed. B 

The reason why I went with Gnome3 is that I thought I may pursue Android 
app development, and the Google Android system requirements page states 
that Gnome3 is required...  I didn't have a preference anyway, so I just 
went with it.  Sure it's a disorienting way of working with your system 
(I still keep looking for the clock in the upper right-hand corner!) but 
as I'm not sure about app development anyway, I don't mind going with 
LXDE or Xfce.

I don't know how to determine whether I've got the "latest video 
driver"...  I just replied to two other posts in this thread, listing 
the output of commands I ran -- perhaps that can show us this info?

Thanks for your help.
Harris

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#166565

On 04/06/2016 08:31 PM, Patrick Bartek wrote:
> On Wed, 06 Apr 2016, Harris Paltrowitz wrote:
>
>> Hi all,
>>
>> First, I'm asking for help on this list because I've observed this to
>> be a very august group :) and I'm actually a bit in awe to be in the
>> presence of Debian developers...  I've only been using Debian for a
>> few weeks -- I'm not new to Linux or Unix, although I'm still a
>> relative beginner.
>>
>> Here's my problem -- when I stream certain videos on Youtube, I
>> consistently get choppy playback performance, whereby the video
>> freezes and restarts randomly, with the audio getting out of sync
>> from that point forward.  The problem is NOT due to the video still
>> being downloaded -- I know this because the progress bar shows that
>> the download is way ahead of my viewing progress.
>>
>> Here are my specs:
>>
>> - Debian Jessie 32-bit (I had installed 8.3 and subsequently ran some
>> updates, but I don't know how to check to see if I'm up to 8.4)
>> - Gnome 3
>> - Firefox 45.0.1
>> - Flash is NOT installed
>> - flashplugin-nonfree is NOT installed
>> - neither gnash nor pepper are installed
>> - example of a video that gets choppy:
>> https://www.youtube.com/watch?v=R6Tok9KUjTw (the problem seems to
>> start during the "man on the street" segments)
>> - When the choppiness is happening, System Monitor tells me that one
>> of my four CPUs is maxing out at 100% at least half the time
>>
>> Hardware:
>> ​- Dell Inspiron 15 3000 Series (Intel(R)) - 3551
>> - Intel Pentium CPU N3540 @ 2.16GHz x 4 (2M Cache, up to 2.66 GHz)
>> - 4GB Single Channel DDR3L 1600MHz (4GBx1)
>> - Graphics: Intel Bay Trail x86/MMX/SSE2
>>
>> I would love to receive help from this list...  thanks much much in
>> advance!
> Why did you install the 32-bit version?  You have a 64-bit system,
> right?
>
> A few months ago, I installed Jessie 32-bit LXDE desktop in VirtualBox
> on a 64-bit host (Wheezy 64-bit) to test video streaming from different
> sources. Videos ran awful like what you describe.  I reinstalled, but
> the 64-bit version.  Videos streamed perfectly.  Everything else
> remained the same.  I just let the installer do its thing.
>
> Why GNOME3?  Could be it's the problem.  I've never been able to try it
> on my systems.  It won't run.  My plain vanilla graphics cards just
> don't have support for it. I get the "fallback" desktop. Also, GNOME3
> has become a bloated resource hog, IMHO.
>
> So, first try the 64-bit version with GANOME3, and if that doesn't
> solve the problem look to a lightweight desktop like LXDE or XFCE, or
> just a window manager.
>
> And, of course, check you've got the latest video driver installed.
>
> B
>

Thanks to all of you who helped with this problem -- here are the 
results of my tests, if you're interested:

- I installed the 64-bit Jessie 8.4 with Gnome 3, but I still had the 
problem.
- I then tried LXDE and Xfce, but I experienced the same problem on both.
- I've noticed that the problem does not occur using Iceweasel 38 that 
ships with Jessie -- the problem only occurs in Firefox 45.  I also 
tried unchecking Hardware Acceleration in Firefox, but that did not help.
- I decided to go with Cinnamon, as I like it the best (I definitely got 
in a nice test of the various desktops during this investigation!) and 
it makes life with my particular trackpad the easiest -- all the other 
desktops were too quirky regarding natural scrolling.

Thanks again!
Harris

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#166507

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On Wed, 2016-04-06 at 12:45 -0400, Harris Paltrowitz wrote:
> Here's my problem -- when I stream certain videos on Youtube, I 
> consistently get choppy playback performance, whereby the video
> freezes 
> and restarts randomly, with the audio getting out of sync from that 
> point forward.  The problem is NOT due to the video still being 
> downloaded -- I know this because the progress bar shows that the 
> download is way ahead of my viewing progress.
[...]
> - When the choppiness is happening, System Monitor tells me that one
> of 
> my four CPUs is maxing out at 100% at least half the time

Output of glxinfo (from mesa-utils) would be interesting. If you have
software GL, it would explain this.


If you do have hardware rendering:

* What process uses the CPU? Firefox, Xorg or something else?

* Does it happen with other browsers, like Chromium too?

* Does it happen if you download the video (youtube-dl or similar) and
play it with a normal video player?

-- 
Cheers,
Sven Arvidsson
http://www.whiz.se
PGP Key ID 6FAB5CD5

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#166508

[Multipart message — attachments visible in raw view] — view raw

On 04/07/2016 10:25 AM, Sven Arvidsson wrote:
> If you do have hardware rendering: * What process uses the CPU? 
> Firefox, Xorg or something else? * Does it happen with other browsers, 
> like Chromium too? 

Very interesting -- the problem does NOT occur on Chromium!  I have the 
latest Chromium ( Version 49.0.2623.108 Built on 8.3, running on Debian 
8.4) and all videos I tried run perfectly...  I also notice that the 
browser performance overall is snappier than Firefox, so it looks like 
I'll stick with Chromium -- although as another poster suggested that 
moving from the 32 bit version of Jessie to 64 could make my video 
performance better (as well as a possible switch from Gnome 3 to LXDE or 
Xfce) I may decide to make these changes as well.

I didn't address your other questions, Sven, because this seems pretty 
conclusive -- but let me know if you're still curious about those 
things.  Thanks!

Harris

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#166509

On Thursday 07 April 2016 16:05:51 Harris Paltrowitz wrote:
> I didn't address your other questions, Sven, because this seems pretty
> conclusive

I shall note for my own use and retire!

Glad you have got there.

Lisi

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#166512

Harris Paltrowitz composed on 2016-04-07 11:05 (UTC-0400):

> On 04/07/2016 10:25 AM, Sven Arvidsson wrote:

>> If you do have hardware rendering: * What process uses the CPU?
>> Firefox, Xorg or something else? * Does it happen with other browsers,
>> like Chromium too?

> Very interesting -- the problem does NOT occur on Chromium!  I have the
> latest Chromium ( Version 49.0.2623.108 Built on 8.3, running on Debian
> 8.4) and all videos I tried run perfectly...  I also notice that the
> browser performance overall is snappier than Firefox, so it looks like
> I'll stick with Chromium -- although as another poster suggested that
> moving from the 32 bit version of Jessie to 64 could make my video
> performance better (as well as a possible switch from Gnome 3 to LXDE or
> Xfce) I may decide to make these changes as well.

If you'd like to continue with Firefox, turning off hardware acceleration 
might help. This was fixed upstream quite some time ago, but maybe that 
problem has returned.

Edit -> Preferences -> Advanced -> General tab -> Browsing section -> 
unselect "Use hardware acceleration when available".
-- 
"The wise are known for their understanding, and pleasant
words are persuasive." Proverbs 16:21 (New Living Translation)

  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!

Felix Miata  ***  http://fm.no-ip.com/

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#166514

On 04/07/2016 01:12 PM, Felix Miata wrote:
>
> If you'd like to continue with Firefox, turning off hardware 
> acceleration might help. This was fixed upstream quite some time ago, 
> but maybe that problem has returned.
>
> Edit -> Preferences -> Advanced -> General tab -> Browsing section -> 
> unselect "Use hardware acceleration when available".

Unfortunately this didn't help -- the problem is still there in 
Firefox.  What's also interesting is that I observed in System Monitor 
that, with Chromium, the usage of my four CPUs is evidently much more 
balanced than with Firefox -- with Chromium, the line graph showing the 
four lines looks like a bunch of wires tightly wrapped together...  
whereas with Firefox, the graph looks basically like spaghetti, with the 
wires very loosely organized.

Harris

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