Red Hat Bugzilla – Bug 451486
Cannot switch monitors with xranrd
Last modified: 2018-04-11 04:05:50 EDT
Description of problem:
After today's upgrade to xorg-x11-server-Xorg-188.8.131.522-3.20080612.fc9.x86_64
the switching between the build in monitor (LVDS) and external monitor does not
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. open terminal and issue xrandr --output VGA --mode 1680x1050 --output LVDS --off
2. same with fedora's GUI to switch monitors
the Xserver is restarted and GDM asks for login
the switch to be possible (it was working the last night, with the previous version)
No errors printed in the X log
Thanks for the bug report. We have reviewed the information you have provided
above, and there is some additional information we require that will be helpful
in our diagnosis of this issue.
Please attach your X server config file (/etc/X11/xorg.conf) and X server log
file (/var/log/Xorg.*.log) to the bug report as individual uncompressed file
attachments using the bugzilla file attachment link below.
Could you please also try to run without any /etc/X11/xorg.conf whatsoever and
let X11 autodetect your display and video card? Attach to this bug
/var/log/Xorg.0.log from this attempt as well, please.
We will review this issue again once you've had a chance to attach this information.
Thanks in advance.
Created attachment 309368 [details]
as requested, original file, created by the install of fedora
Created attachment 309369 [details]
Xorg log file
Xorg log as requested run with xorg.conf present
Created attachment 309370 [details]
The Xorg log file made without xorg.conf file as requested
I can also confirm the behaviour on i386 exactly after the same update of Xorg.
Can please someone isolate this? Confirm it maybe?
Confirmed same on Intel 855GM - same Xorg version, i386 package. Seems the
problem is in the Xorg server.
Here is a backtrace in the log (intel 855GM, i386)
(II) intel(0): I2C device "LVDSDDC_C:ddc2" registered at address 0xA0.
(II) intel(0): I2C device "LVDSDDC_C:ddc2" removed.
0: /usr/bin/Xorg(xf86SigHandler+0x79) [0x80bcaa9]
2: /usr/bin/Xorg(xf86ModesEqual+0xc) [0x80ed67c]
3: /usr/bin/Xorg(xf86SetScrnInfoModes+0x1b3) [0x80e70f3]
4: /usr/bin/Xorg [0x80eeed8]
5: /usr/bin/Xorg(RRGetInfo+0xb1) [0x816dd81]
6: /usr/bin/Xorg(ProcRRGetScreenSizeRange+0xaa) [0x81716ba]
7: /usr/bin/Xorg [0x816ab05]
8: /usr/bin/Xorg(Dispatch+0x34f) [0x8085c8f]
9: /usr/bin/Xorg(main+0x47d) [0x806b60d]
10: /lib/libc.so.6(__libc_start_main+0xe6) [0x91c5d6]
11: /usr/bin/Xorg(FontFileCompleteXLFD+0x229) [0x806a9f1]
Fatal server error:
Caught signal 11. Server aborting
(II) UnloadModule: "mouse"
Also this happens only in gnome-session, if I telinit 3 and start X with Xorg &
and then open a terminal there I can switch the monitors.
Sometimes the first switch in gnome session works but then when I try to switch
back it crashes.
Please, would someone take a look at that, its been long time i cannot connect
my laptop to any monitor.
This is to confirm that the issue is resolved with
Sorry but I have to re-open this - the solution seem to be partial.
Now on the current release in fedora updates I can switch the monitors but only
one at a time on the command line i.e.
xrandr --output ... [other options]
If I use the --output parameter once more on the same command the X server
crashes again i.e.
xrandr --output VGA --mode 1280x1024 --output LVDS --off
this crash the X
This implies that the GUI in fedora designated to manipulate the screen is
unusable as it tries to use both --output parameters at the same time to turn
off the LVDS and on the VGA with the selected mode and this crashes the server.
I believe I'm seeing a similar problem. I have script which invokes xrandr, but
it invokes xrandr once per output. The crash is not consistent, but usually
occurs when changing the number of heads, e.g. 1 head --> 2 heads or 2 heads -->
1 head. Sorry, but I haven't figured out the exact pattern. Server is:
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