Bug 21575

Summary: [i965] Fast user switch freezes X (UXA bug)
Product: xorg Reporter: Bryce Harrington <bryce>
Component: Driver/intelAssignee: Eric Anholt <eric>
Status: RESOLVED FIXED QA Contact: Xorg Project Team <xorg-team>
Severity: major    
Priority: high CC: hugo_st_germain
Version: 7.4 (2008.09)   
Hardware: x86 (IA32)   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments:
Description Flags
XorgLog.txt
none
XorgLogOld.txt none

Description Bryce Harrington 2009-05-05 13:39:20 UTC 
Forwarding this issue from a ubuntu reporter (a couple people have seen the same issue now):
https://bugs.edge.launchpad.net/ubuntu/+source/xserver-xorg-video-intel/+bug/370343

[Problem]
Crashes when attempting to switch to another user. 100% reproducible. Blank screen, keyboard locked-up must hard reboot. Does not occur when UXA not enabled.

Standard Ubuntu 9.04 install except for Option "AccelMethod" "uxa" added to Xorg.conf.

[lspci]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 03)

 distro:             Ubuntu
 architecture:       i686
 kernel:             2.6.28-11-generic
 xserver-xorg:       1:7.4~5ubuntu18
 mesa:               7.4-0ubuntu3
 libdrm:             2.4.5-0ubuntu4
 -intel:             2:2.6.3-0ubuntu9
 -ati:               1:6.12.1-0ubuntu2
Comment 1 Bryce Harrington 2009-05-05 13:39:57 UTC 
Created attachment 25497 [details]
XorgLog.txt
Comment 2 Bryce Harrington 2009-05-05 13:40:20 UTC 
Created attachment 25498 [details]
XorgLogOld.txt
Comment 3 Bryce Harrington 2009-05-05 13:40:52 UTC 
See also https://bugs.launchpad.net/bugs/331795 which appears to be a dupe
Comment 4 Hugo St-Germain 2009-05-05 16:55:47 UTC 
I am the reporter of the associated Ubuntu bug. I will be happy to provide any additional information that might be helpful.

Thanks!
Comment 5 Gordon Jin 2009-05-05 19:00:41 UTC 
Eric you have pushed a fix for this, right? Could you give the commit info?
Comment 6 Eric Anholt 2009-05-06 13:35:30 UTC 
At least these are required:

commit 3187c7698b93f1d0e07798e9c42ca2877d55e055
Author: Eric Anholt <eric@anholt.net>
Date:   Mon Apr 27 14:50:54 2009 -0700

    Fix assert at startup with DRI initialiation failure.

commit fbaf13c93511547c563129527797fbef8628652e
Author: Eric Anholt <eric@anholt.net>
Date:   Mon Apr 27 16:05:50 2009 -0700

    Don't clear the framebuffer if it isn't currently bound.

commit ab878118b9fb46c437a02f824d29f4a206e7fd80
Author: Eric Anholt <eric@anholt.net>
Date:   Mon Apr 27 16:00:05 2009 -0700

    Don't initialize DRI2 if the fd we get is not master-capable.

commit e55d943126cdd3eac7dfec5f40e794f89dbf038b
Author: Eric Anholt <eric@anholt.net>
Date:   Mon Apr 27 11:18:07 2009 -0700

    Don't try to do anything for I830Sync when VT switched.

commit 9748aa5594a8357754c06dd82108b131260b1a71
Author: Shuang He <shuang.he@intel.com>
Date:   Sat Apr 18 11:48:08 2009 +0800

    Free front buffer bo when X exit
Comment 7 Hugo St-Germain 2009-05-06 19:16:16 UTC 
I confirm that this bug is no longer present with Kernel 2.6.30-020630rc4 and xserver-xorg-video-intel 2:2.7.99.1+git20090505 from the Ubuntu xorg-edgers PPA installed on top of Ubuntu 9.04. 

Thanks!

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