Re: dual monitor setup fails (xrandr: Failed to get size of gamma for output default; warning: output LVDS not found; ignoring; warning: output VGA not found; ignoring)
Hi Camaleón,
Thanks for you help :)
> On Sat, 2010-12-18 at 15:17 +0000, Camaleón wrote:
> > On Sat, 18 Dec 2010 14:06:25 +0900, Dietrich Bollmann wrote:
> >
> > Since a couple of weeks my dual monitor setup fails:
> >
> > # xrandr --output LVDS --output VGA --right-of LVDS --primary
> >
> > xrandr: Failed to get size of gamma for output default warning:
output
> > LVDS not found; ignoring warning: output VGA not found; ignoring
>
> Review your "/var/log/Xorg.0.log" file to find out what outputs is
> detecting Xorg. You can also run "xrandr -q" to discover what is
> connected.
Here some lines from the beginning:
...
(==) Log file: "/var/log/Xorg.0.log", Time: Fri Dec 24 15:43:27 2010
(==) Using system config directory "/usr/share/X11/xorg.conf.d"
(==) No Layout section. Using the first Screen section.
(==) No screen section available. Using defaults.
(**) |-->Screen "Default Screen Section" (0)
(**) | |-->Monitor "<default monitor>"
(==) No monitor specified for screen "Default Screen Section".
Using a default monitor configuration.
(==) Automatically adding devices
(==) Automatically enabling devices
...
and here the result of trying to find something relevant with egrep:
egrep '\(!!|WW|EE|NI|\?\?\)' /var/log/Xorg.0.log
Current Operating System: Linux pippi 2.6.33.7-rt29-1-686 #1 SMP PREEMPT
RT Tue Aug 3 17:42:24 UTC 2010 i686
(++) from command line, (!!) notice, (II) informational,
(WW) warning, (EE) error, (NI) not implemented, (??) unknown.
(WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist.
(II) Loading extension MIT-SCREEN-SAVER
(WW) Falling back to old probe method for fbdev
(EE) open /dev/fb0: No such file or directory
(WW) VESA(0): Unable to estimate virtual size
ls -la /usr/share/X11/xorg.conf.d
total 20
drwxr-xr-x 2 root root 4096 Dec 11 11:58 .
drwxr-xr-x 6 root root 4096 Dec 11 12:06 ..
-rw-r--r-- 1 root root 1099 Dec 2 09:15 10-evdev.conf
-rw-r--r-- 1 root root 661 Apr 18 2010 20-wacom.conf
-rw-r--r-- 1 root root 127 Apr 18 2010 50-synaptics.conf
Can you give me a hint for what I should search for in the xorg log?
By myself I couldn't find anything interesting...
xrandr -q
gives the following output:
xrandr: Failed to get size of gamma for output default
Screen 0: minimum 640 x 480, current 1280 x 1024, maximum 1280 x 1024
default connected 1280x1024+0+0 0mm x 0mm
1280x1024 0.0*
1024x768 0.0
800x600 0.0
640x480 0.0
> Note that LVDS and VGA names can be different if you are using a KMS
> enabled intel video driver (LVDS1/VGA1).
>
> > xrand without parameters produces the following output:
> >
> > # xrandr
> >
> > xrandr: Failed to get size of gamma for output default Screen 0:
minimum
> > 640 x 480, current 1280 x 1024, maximum 1280 x 1024 default
connected
> > 1280x1024+0+0 0mm x 0mm
> > 1280x1024 0.0*
> > 1024x768 0.0
> > 800x600 0.0
> > 640x480 0.0
> >
> > What can I do?
>
> It seems the external display is not being detected. Your xorg log
should
> contain more data.
Thanks. What kind of data could that be?
> > I erased the /etc/X11/xorg.conf as x windows didn't start anymore
and
> > this was the only way I found to make it start again and get back to
> > work. Trying after to reconfigure xserver-xorg with
> > dpkg-reconfigure xserver-xorg
> > didn't recreate /etc/X11/xorg.conf. Could this be related?
>
> locate xorg.conf
locate xorg.conf
/etc/X11/xorg.conf.20080418064505
/etc/X11/xorg.conf.20080418064650
/etc/X11/xorg.conf.20080418075252
/etc/X11/xorg.conf.20090513151200
/etc/X11/xorg.conf.20090514131411
/etc/X11/xorg.conf.20090514131504
/etc/X11/xorg.conf.bu-2009-05-14
/etc/X11/xorg.conf.bu2010
/usr/share/X11/xorg.conf.d
/usr/share/X11/xorg.conf.d/10-evdev.conf
/usr/share/X11/xorg.conf.d/20-wacom.conf
/usr/share/X11/xorg.conf.d/50-synaptics.conf
/usr/share/xresprobe/xorg.conf
The file
/etc/X11/xorg.conf.bu2010
is my backup from my last configuration which stopped to work, producing
the following error:
Failed to start the X server (your graphical interface).
It is likely that it is not set up correctly. ...
The only way I found was to delete /etc/X11/xorg.conf ...
Here its content:
cat /etc/X11/xorg.conf.bu2010 | egrep -v '^#|^\s*$'
Section "Device"
Identifier "Configured Video Device"
EndSection
Section "Screen"
Identifier "Default Screen"
SubSection "Display"
Virtual 2048 2048
EndSubSection
EndSection
Section "ServerLayout"
Identifier "Default Layout"
Screen "Default Screen"
EndSection
I remember to have read somewhere, that /etc/X11/xorg.conf is not used
anymore as the configuration is dynamically generated. Is that true?
wrong? Should I try to regenerate it? If so, how? dpkg-reconfigure
xserver-xorg seems to not do anything at all...
But now only the external screen works - and in my office, the screen
resolution is too low resulting in a horrible presentation :(
> After running the above command ("dpkg-reconfigure xserver-xorg"),
your
> "xorg.conf" file should be created under root's home (/root/
> xorg.conf.new), if you want to make use of it, you'll have to move it
to
> the right folder.
dpkg-reconfigure xserver-xorg
seems to create nothing at all :(
find /root | grep -i xorg
...no output...
ls -la /etc/X11/xorg.conf*
-rw-r--r-- 1 root root 3321 Apr 18
2008 /etc/X11/xorg.conf.20080418064505
-rw-r--r-- 1 root root 3321 Apr 18
2008 /etc/X11/xorg.conf.20080418064650
-rw-r--r-- 1 root root 4425 Apr 18
2008 /etc/X11/xorg.conf.20080418075252
-rw-r--r-- 1 root root 3887 May 13
2009 /etc/X11/xorg.conf.20090513151200
-rw-r--r-- 1 root root 3888 May 14
2009 /etc/X11/xorg.conf.20090514131411
-rw-r--r-- 1 root root 682 May 14
2009 /etc/X11/xorg.conf.20090514131504
-rw-r--r-- 1 root root 3888 May 14
2009 /etc/X11/xorg.conf.bu-2009-05-14
-rw-rw-rw- 1 root root 3267 May 14 2009 /etc/X11/xorg.conf.bu2010
Thanks for your help,
Dietrich
> Greetings,
>
> --
> Camaleón
>
>
>
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