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Re: Problem with 2 external monitors on a laptop

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  Re: Problem with 2 external monitors on a laptop Floris <jkfloris@dds.nl> - 2016-10-07 12:30 +0200
    Re: Problem with 2 external monitors on a laptop Nicholas Geovanis <nickgeovanis@gmail.com> - 2016-10-07 16:10 +0200

#173266 — Re: Problem with 2 external monitors on a laptop

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Op Thu, 06 Oct 2016 15:17:56 +0200 schreef Xxxxxxx Yyyyyyy  
<debian-list@wp.pl>:

>
> Hi.
> I use HP ProBook 6560b (LVDS1) with 2 external Fujitsus B24T (VGA1,  
> HDMI2), both connected via docking station.
>
> OS: debian testing with xfce
>
>
> LVDS1 - off
>
> VGA1 - on
>
> HDMI2 - on
>
>
> Recent (approx 1 month back) apt-get upgrade (also using latest  
> debian-testing.iso) made it impossibe to use this >configuration.
>
> I'm asked for a LUKS password, i can see initial on-screen logs but when  
> Os tries to start X, both monitors goes black (i >cannot switch to TTY).
>
>
> However when one of monitors is unplugged, OS & X starts with no errors,  
> then i plug the other monitor in and they both >works.
>
>
> Mariusz
>
>
create the folder
/var/log/journal

reboot with both monitors plugged in and let the configuration fail
unplug a monitor, reboot and use
journalctl -b -1
to read the error messages


Floris

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#173271

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I have likely the same problem with a single external monitor in Jessie. In
fact the OS or X is turning down the brightness on the monitors. If you
haven't already, simply try increasing brightness.

On Fri, Oct 7, 2016 at 5:28 AM, Floris <jkfloris@dds.nl> wrote:

> Op Thu, 06 Oct 2016 15:17:56 +0200 schreef Xxxxxxx Yyyyyyy <
> debian-list@wp.pl>:
>
>
> Hi.
> I use HP ProBook 6560b (LVDS1) with 2 external Fujitsus B24T (VGA1,
> HDMI2), both connected via docking station.
>
> OS: debian testing with xfce
>
>
>
> LVDS1 - off
>
> VGA1 - on
>
> HDMI2 - on
>
>
>
> Recent (approx 1 month back) apt-get upgrade (also using latest
> debian-testing.iso) made it impossibe to use this configuration.
>
> I'm asked for a LUKS password, i can see initial on-screen logs but when
> Os tries to start X, both monitors goes black (i cannot switch to TTY).
>
>
>
> However when one of monitors is unplugged, OS & X starts with no errors,
> then i plug the other monitor in and they both works.
>
>
>
> Mariusz
>
>
>
> create the folder
> /var/log/journal
>
> reboot with both monitors plugged in and let the configuration fail
> unplug a monitor, reboot and use
> journalctl -b -1
> to read the error messages
>
>
> Floris
>
>

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