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After some effort, can't change grub screen resolution

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  After some effort, can't change grub screen resolution Lance Simmons <simmons.lance@gmail.com> - 2018-06-29 08:00 +0200
    Re: After some effort, can't change grub screen resolution Michael Lange <klappnase@freenet.de> - 2018-06-29 10:10 +0200
    Re: After some effort, can't change grub screen resolution Felix Miata <mrmazda@earthlink.net> - 2018-06-29 11:30 +0200
    Re: After some effort, can't change grub screen resolution Darac Marjal <mailinglist@darac.org.uk> - 2018-06-29 11:40 +0200
      Re: After some effort, can't change grub screen resolution Lance Simmons <simmons.lance@gmail.com> - 2018-06-29 18:20 +0200

#197007 — After some effort, can't change grub screen resolution

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I want to change grub screen resolution.

Four facts:

(1) "vbeinfo" and "videoinfo" return no result in grub.  The screen blanks
and eventually I restart the computer.

(2) "hwinfo --framebuffer" returns no result.  I would append the logfile,
but it's 7500 lines long.

(3) running

lspci  -v -s  $(lspci | grep ' VGA ' | cut -d" " -f 1)

returns:

00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium
Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller (rev 35)
(prog-if 00 [VGA controller])
Subsystem: ASRock Incorporation Atom/Celeron/Pentium Processor
x5-E8000/J3xxx/N3xxx Integrated Graphics Controller
Flags: bus master, fast devsel, latency 0, IRQ 121
Memory at 90000000 (64-bit, non-prefetchable) [size=16M]
Memory at 80000000 (64-bit, prefetchable) [size=256M]
I/O ports at f000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [d0] Power Management version 2
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Capabilities: [b0] Vendor Specific Information: Len=07 <?>
Kernel driver in use: i915
Kernel modules: i915

(4) So far, changing GRUB_GFXMODE (in /etc/default/grub) to several of the
resolutions I know my monitor supports (and then running "sudo
update-grub") has no effect.

Any suggestions?

I've been running sid for a year, but this has been a problem since I got
the computer a couple of years ago and was running stable so I figure it's
not sid-specific.

-- 
Lance Simmons

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#197009

Hi,

On Fri, 29 Jun 2018 00:49:53 -0500
Lance Simmons <simmons.lance@gmail.com> wrote:

(...)
> 
> (4) So far, changing GRUB_GFXMODE (in /etc/default/grub) to several of
> the resolutions I know my monitor supports (and then running "sudo
> update-grub") has no effect.
> 
> Any suggestions?

I had a similar problem some time ago; I am no expert, so I had to try a
few things, and finally came up with these lines in /etc/default/grub:

GRUB_GFXMODE=1024x768
GRUB_GFXPAYLOAD=1024x768

This works, at least here :)

Regards

Michael


.-.. .. ...- .   .-.. --- -. --.   .- -. -..   .--. .-. --- ... .--. . .-.

You are an excellent tactician, Captain.  You let your second in
command attack while you sit and watch for weakness.
		-- Khan Noonian Singh, "Space Seed", stardate 3141.9

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#197012

Lance Simmons composed on 2018-06-29 00:49 (UTC-0500):

> (1) "vbeinfo" and "videoinfo" return no result in grub.  The screen blanks
> and eventually I restart the computer.

Neither work at my current Grub2-efi prompt on Kaby Lake. From videoinfo, I do
get a two line output:

	List of supported video modes:
	Legend: mask/position=red/gree/blue/reserved
...
> (3) running

> lspci  -v -s  $(lspci | grep ' VGA ' | cut -d" " -f 1)

Give inxi -G -c0 a try.

> Any suggestions?

If you've only ever used UEFI boot mode on that Asrock, try booting a USB stick
or HD with Grub2 installed in CSM (non-UEFI/GPT) mode to see if either command
returns anything. Neither vbeinfo nor videoinfo has _ever_ worked for me. I
suspect those commands are not compatible with one of either various UEFI BIOS,
or all UEFI BIOS.

Ask on the help-grub or Grub-devel mailing lists if you can't get a Google
answer that lines up with my suspicion. and nothing useful turns up here. I only
use Grub2 on UEFI systems with GPT, always Grub Legacy with MBR disks.
-- 
"Wisdom is supreme; therefore get wisdom. Whatever else you
get, get wisdom." Proverbs 4:7 (New Living Translation)

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

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

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#197013

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On Fri, Jun 29, 2018 at 12:49:53AM -0500, Lance Simmons wrote:
>   I want to change grub screen resolution.
>   Four facts:
>   (1) "vbeinfo" and "videoinfo" return no result in grub.  The screen blanks and eventually I restart the computer.

This /probably/ means that grub doesn't know how to control your video 
device. 

>   (2) "hwinfo --framebuffer" returns no result.  I would append the logfile, but it's 7500 lines long.
>   (3) running
>
> lspci  -v -s  $(lspci | grep ' VGA ' | cut -d" " -f 1)
>
>   returns:
>   00:02.0 VGA compatible controller: Intel Corporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics
>   Controller (rev 35) (prog-if 00 [VGA controller])
>   Subsystem: ASRock Incorporation Atom/Celeron/Pentium Processor x5-E8000/J3xxx/N3xxx Integrated Graphics Controller
>   Flags: bus master, fast devsel, latency 0, IRQ 121
>   Memory at 90000000 (64-bit, non-prefetchable) [size=16M]
>   Memory at 80000000 (64-bit, prefetchable) [size=256M]
>   I/O ports at f000 [size=64]
>   [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
>   Capabilities: [d0] Power Management version 2
>   Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
>   Capabilities: [b0] Vendor Specific Information: Len=07 <?>
>   Kernel driver in use: i915
>   Kernel modules: i915
>   (4) So far, changing GRUB_GFXMODE (in /etc/default/grub) to several of the resolutions I know my monitor supports (and then
>   running "sudo update-grub") has no effect.

Just as a wild stab-in-the-dark, have you tried GRUB_GFXMODE=auto ? This 
is the default when using gfxterm, though, so you've probably already 
got the best grub can do.

One thing that you don't mention, which could be potentially useful is 
how your computer boots. Is it BIOS (in which case you have grub-pc 
installed) or (U)EFI (in which case you have grub-efi-ia32 or 
grub-efi-amd64 installed)? UEFI brings easier access to higher 
resolutions, so if you have the option to switch to that, it may be 
beneficial.

>   Any suggestions?
>   I've been running sid for a year, but this has been a problem since I got the computer a couple of years ago and was running
>   stable so I figure it's not sid-specific.
>   --
>   Lance Simmons

-- 
For more information, please reread.

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#197032

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On Fri, Jun 29, 2018 at 4:34 AM Darac Marjal <mailinglist@darac.org.uk>
wrote:

>
> Is it BIOS (in which case you have grub-pc
> installed) or (U)EFI (in which case you have grub-efi-ia32 or
> grub-efi-amd64 installed)?
>

I have UEFI (which I just learned), but grub-pc is installed. I assume
that's because the UEFI has legacy mode turned on.

Can I move from grub-pc to grub-efi-amd64? There are a few random webpages
that suggest it's difficult; I haven't found an authoritative source that
says how to do it.

I didn't notice anything in the gnu.org help-grub archive that seemed
relevant, but I may have missed something.

-- 
Lance Simmons

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