Red Hat Bugzilla – Bug 329051
Crash in attempted multihead configuration
Last modified: 2018-04-11 11:00:02 EDT
Description of problem:
Attempting to setup dual head configuration, with DVI and VGA outputs pointing
at 2 LCD screens fails.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1. Using supplied xorg.conf
2. Start X
Sig11 in X server
cannot restore display (perhaps a kernel issue)
dual head-lovelyness. Actually seen working with xrandr at runtime
System works (single head) without a config file. Runs in clone mode if VGA
connector sill connected to other LCD.
Created attachment 225051 [details]
Working xorg log, from no config (others to follow)
Created attachment 225061 [details]
Config that causes the crash
Created attachment 225071 [details]
Xorg config showing Sig11
Any suggestions as to debuginfo packages to install and advise on how best to
attach gdb for a more useful backtrace gratefully accepted.
I think we have what we need in the attachment 225071 [details], and I will now pass it to
the developers. If you want to digg deeper, there is of course
Created attachment 291037 [details]
Debug session on another computer showing the same issue
Another of my computers (ati chipset) shows the same issue, and gdb shows up
the NULL pointer de-reference easily.
This appears to be in the common code, rather than the i810 driver.
sorry for the stream of updates...
This occurs on current rawhide, with
When avoiding the old multi-head code, and using new randr only, it now works on
both F8 (i810) and rawhide (radeon).
However, the path to this segfault should be eliminated...