Bug 18700

Summary:

AllowEmptyInput keyword in xorg.conf triggers xserver crash on current git

Product:

xorg

Reporter:

Alex Villacís Lasso <avillaci>

Component:

Input/other

Assignee:

Xorg Project Team <xorg-team>

Status:

RESOLVED FIXED

QA Contact:

Xorg Project Team <xorg-team>

Severity:

major

Priority:

medium

Keywords:

regression

Version:

git

Hardware:

x86 (IA32)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Configuration file used for Xorg	none
Xorg.0.log after X server crashes	none
Xorg.0.log of previous (working) git tree	none
Heads of each git tree used in build	none

Description Alex Villacís Lasso 2008-11-25 08:20:47 UTC

Testing current git for full xorg tree with Fedora 8 and kernel 2.6.26.6-49.fc8 from distro. As far as I know, distro does not support evdev.

When running the then-current git from a month ago, the X server started up with /etc/X11/xorg.conf from distro, but keyboard and mouse did not work. By suggestion of the log file, the AllowEmptyInput keyword was added to the configuration file, and the X server started up without further problems.

With current git as of 2008/11/24 11:00 GMT -5 , xserver tree built from it crashes inmediately with a segfault after using the previously-working configuration file. When removing the AllowEmptyInput keyword, X server starts up again, but again mouse and keyboard are unresponsive.

Steps to reproduce:
- System uses PS/2 keyboard and mouse
- Use distro without evdev support (Fedora 8 in my case)
- Prepare xorg.conf with AllowEmptyInput keyword
- Attempt to start up xserver from current git

Expected results:
xserver should start normally

Actual results:
Screen flickers for a moment, then goes back to command line. Log file shows segfault.

Comment 1 Alex Villacís Lasso 2008-11-25 08:22:41 UTC

Created attachment 20576 [details]
Configuration file used for Xorg

Configuration file from system. Compiled tree is in /home/alex/xserver .

Comment 2 Alex Villacís Lasso 2008-11-25 08:24:11 UTC

Created attachment 20577 [details]
Xorg.0.log after X server crashes

This is the log file from the xserver right after the crash. Please note the segfault at the end.

Comment 3 Alex Villacís Lasso 2008-11-25 08:27:13 UTC

Created attachment 20578 [details]
Xorg.0.log of previous (working) git tree

This is the log file of the working build.

Comment 4 Alex Villacís Lasso 2008-11-25 08:55:09 UTC

Created attachment 20579 [details]
Heads of each git tree used in build

Generated with:

 for i in app/* data/* doc/* driver/* drm font/* lib/* mesa pixman proto/* util/* xcb/* xserver ; do CWD=`pwd`; echo $i >> salida-git-log.txt ; cd "$i"; git-log -1 </dev/null >> /home/alex/checkouts/xserver/git/salida-git-log.txt ; cd $CWD ; done

Comment 5 Peter Hutterer 2008-11-25 16:57:03 UTC

I merged the wrong patch, patch reverted and the correct one pushed as 
ec1d08442f69353cb0e73ac4eaf0346ebb975594. Thanks for reporting.

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