Bug 51640

Summary: [Intel] use of xorg.conf or xorg.conf.d/ for customizing monitor config causes segfault on X startup
Product: xorg Reporter: Felix Miata <mrmazda>
Component: Server/GeneralAssignee: Xorg Project Team <xorg-team>
Status: VERIFIED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: medium    
Version: unspecified   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
(Fedora) Xorg.0.log none

Description Felix Miata 2012-07-01 18:41:26 UTC 
Created attachment 63683 [details]
(Fedora) Xorg.0.log

Downstream (server 1.12.2): https://bugzilla.novell.com/show_bug.cgi?id=766059
Today I learned this also happens in Fedora 18, also using server 1.12.2.

To reproduce:
1-create valid xorg.conf file; or 50-monitor.conf file with valid VertRefresh,
PreferredMode and/or DisplaySize lines (along with requisite 50-device.conf &
50-screen.conf files, containing nothing non-default)
2-# startx

Actual behavior:
1-immediate segfault
2-no X
3-too small everything
4-[attached Xorg.0.log]

Expected behavior:
1-X works
2-bigger everything

Notes:
1-Happens on i865, i915 & i945, but not on i810 or nvidia (nv11, g84) or ati (rv200, rv380) chips tested.
2-Both openSUSE 12.2 and Fedora 18 are currently running intel driver 2.19, the former with glamor, the latter apparently without.
Comment 1 Chris Wilson 2012-07-02 01:20:41 UTC 
commit 6138f7434a6fb014299a7e9a8392ef962c8cba30
Author: Cyril Brulebois <kibi@debian.org>
Date:   Tue Jun 12 21:19:14 2012 +0100

    Fix up braindamage in previous commit.
    
    ickle: Fixing up my idiotic change, obviously too much birthday cake.

commit 224d631a232d3536e0f1f2780bfbe1218ee7590f
Author: Cyril Brulebois <kibi@debian.org>
Date:   Tue Jun 12 21:14:53 2012 +0100

    Avoid calling xf86nameCompare() with a NULL string
    
    Device sections without a Driver property would lead to a server
    segfault because of a NULL pointer's being passed as the second
    argument of xf86nameCompare().
    
    Debian bug #677206 <http://bugs.debian.org/677206>
    
    Signed-off-by: Cyril Brulebois <kibi@debian.org>
Comment 2 Felix Miata 2012-07-02 10:31:36 UTC 
Verified fixed for i845, i865, i915 & i945 using xf86-video-intel-2.19.0_20120601_8eed569-18.1.i586 in openSUSE 12.2B2+. Thanks for quick response!

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