Problem with the output to the external Monitor from laptop

7 Antworten [Letzter Beitrag]
yang
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Beigetreten: 04/25/2012

I am facing an "issue" after upgrade from toutatis to belenos (the upgrade went smoothly, thanks quidam for making smooth transition !), which results in my external Samsung VGA LCD monitor not getting any output from my laptop's VGA outgoing port. Previously I had a virtual dual-screen setup, which worked, and the external monitor got the picture, when I started X/gdm (not before) but now the command "xrandr" which is supposed to list the outgoing outputs gives an error:

root@trisquel# xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1366 x 768, current 1366 x 768, maximum 1368 x 768
default connected primary 1366x768+0+0 0mm x 0mm
1366x768 0.0*
1368x768 0.0

Previously it listed "VGA-0" as secondary output which went to my external monitor, so I was able to use the virtual screen solution there. I should add that the /etc/X11/xorg.conf file hasn't changed during the upgrade and remained the same as being used in toutatis.

root@trisquel# lspci -v |grep VGA
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Wrestler [Radeon HD 7340] (prog-if 00 [VGA controller])

I already googled up the "xrandr" error, but couldn't find anything related that would fix my issue, I assume that it could maybe be a (proprietary) driver related issue ?

Any hints are appreciated, I can paste more commands if needed to investigate the error ...

Thank you !

yang
Offline
Beigetreten: 04/25/2012

I am facing an "issue" after upgrade from toutatis to belenos (the upgrade
went smoothly, thanks quidam for making smooth transition !), which results
in my external Samsung VGA LCD monitor not getting any output from my
laptop's VGA outgoing port. Previously I had a virtual dual-screen setup,
which worked, and the external monitor got the picture, when I started X/gdm
(not before) but now the command "xrandr" which is supposed to list the
outgoing outputs gives an error:

root@trisquel# xrandr
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 1366 x 768, current 1366 x 768, maximum 1368 x 768
default connected primary 1366x768+0+0 0mm x 0mm
1366x768 0.0*
1368x768 0.0

Previously it listed "VGA-0" as secondary output which went to my external
monitor, so I was able to use the virtual screen solution there. I should add
that the /etc/X11/xorg.conf file hasn't changed during the upgrade and
remained the same as being used in toutatis.

root@trisquel# lspci -v |grep VGA
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Wrestler [Radeon HD 7340] (prog-if 00 [VGA controller])

I already googled up the "xrandr" error, but couldn't find anything related
that would fix my issue, I assume that it could maybe be a (proprietary)
driver related issue ?

Any hints are appreciated, I can paste more commands if needed to investigate
the error ...

Thank you !

Magic Banana

I am a member!

I am a translator!

Online
Beigetreten: 07/24/2010

jxself maintains a repository with Linux-libre 3.4 that should properly drive your AMD video board: https://jxself.org/linux-libre/

yang
Offline
Beigetreten: 04/25/2012

Case solved.

This is just a reference for myself to check on it later.
Solution was to comment #blacklist radeon in /etc/modprobe.d/disable-radeon.conf

lembas
Offline
Beigetreten: 05/13/2010

Thanks for sharing!

lembas
Offline
Beigetreten: 05/13/2010

Thanks for sharing!

yang
Offline
Beigetreten: 04/25/2012

Case solved.

This is just a reference for myself to check on it later.
Solution was to comment #blacklist radeon in
/etc/modprobe.d/disable-radeon.conf

Magic Banana

I am a member!

I am a translator!

Online
Beigetreten: 07/24/2010

jxself maintains a repository with Linux-libre 3.4 that should properly drive
your AMD video board: https://jxself.org/linux-libre/