Xorg crash in PlayReleasedEvents() [natty,oneiric] - (xi2 issue?)

[Paul Holcomb]

X crashes upon opening an xterm after a variable amount of time. I've been able to recreate this bug under Natty
(xserver-xorg-core: 2:1.10.1-1ubuntu1.2) and Oneiric (2:1.10.4-1ubuntu4.2) but was only able to generate a full backtrace and collect a core file under Natty; this problem is hard to reproduce.

It appears the problem introduced in: 500_xi2.1.patch

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: xorg 1:7.6+4ubuntu3.1
ProcVersionSignature: Ubuntu 2.6.38-11.48-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic x86_64
NonfreeKernelModules: nvidia
.proc.driver.nvidia.gpus.0: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/0'
.proc.driver.nvidia.gpus.1: Error: [Errno 21] Is a directory: '/proc/driver/nvidia/gpus/1'
.proc.driver.nvidia.registry: Binary: ""
.proc.driver.nvidia.version:
 NVRM version: NVIDIA UNIX x86_64 Kernel Module 280.13 Wed Jul 27 16:53:56 PDT 2011
 GCC version: gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4)
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,compiztoolbox,decor,gnomecompat,grid,imgpng,mousepoll,move,place,regex,resize,session,snap,wall,animation,ezoom,staticswitcher,workarounds,fade,scale]
Date: Wed Nov 30 09:40:47 2011
DistUpgraded: Fresh install
DistroCodename: natty
DistroVariant: ubuntu
DkmsStatus:
 nvidia-current, 280.13, 2.6.38-11-generic, x86_64: installed
 vboxhost, 4.0.12, 2.6.38-11-generic, x86_64: installed
GraphicsCard:
 nVidia Corporation NV43 [Quadro NVS 440] [10de:014a] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: nVidia Corporation Device [10de:0358]
 nVidia Corporation NV43 [Quadro NVS 440] [10de:014a] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: nVidia Corporation Device [10de:0358]
JockeyStatus:
 xorg:nvidia_173 - NVIDIA accelerated graphics driver (Proprietary, Disabled, Not in use)
 xorg:nvidia_current - NVIDIA accelerated graphics driver (Proprietary, Enabled, Not in use)
MachineType: Dell Inc. OptiPlex 990
ProcEnviron:
 PATH=(custom, user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-2.6.38-11-generic root=/dev/mapper/ub_vg_2011_09-root ro
Renderer: Unknown
SourcePackage: xorg
Symptom: display
Title: Xorg crash
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/26/2011
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A02
dmi.board.name: 06D7TR
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 6
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA02:bd02/26/2011:svnDellInc.:pnOptiPlex990:pvr01:rvnDellInc.:rn06D7TR:rvrA00:cvnDellInc.:ct6:cvr:
dmi.product.name: OptiPlex 990
dmi.product.version: 01
dmi.sys.vendor: Dell Inc.
version.compiz: compiz 1:0.9.4+bzr20110606-0ubuntu1~natty2
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.23-1ubuntu6
version.libgl1-mesa-dri: libgl1-mesa-dri 7.10.2-0ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 7.10.2-0ubuntu2
version.nvidia-graphics-drivers: nvidia-graphics-drivers N/A
version.xserver-xorg: xserver-xorg 1:7.6+4ubuntu3.1
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:6.14.0-0ubuntu4.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.14.0-4ubuntu7.1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:0.0.16+git20110107+b795ca6e-0ubuntu7

[Paul Holcomb (noptys)]

#0 0x0000000000434d25 in PlayReleasedEvents () at ../../dix/events.c:1188
        prev = <value optimized out>
        qe = 0x2798730
        dev = <value optimized out>
        pDev = <value optimized out>
#1 ComputeFreezes () at ../../dix/events.c:1385
        replayDev = <value optimized out>
        w = <value optimized out>
        grab = <value optimized out>
        dev = <value optimized out>
#2 0x000000000043545b in ProcAllowEvents (client=0x1d8e530)
    at ../../dix/events.c:1846
        time = {months = 0, milliseconds = 1900666646}
        mouse = 0x1b67020
        keybd = <value optimized out>
        stuff = 0x6175470
#3 0x00000000004411a9 in Dispatch () at ../../dix/dispatch.c:431
        clientReady = 0x1d202b0
        result = <value optimized out>
        client = 0x1d8e530
        nready = 0
        icheck = 0x7f1490
        start_tick = 35660
#4 0x0000000000421a7e in main (argc=8, argv=<value optimized out>,
    envp=<value optimized out>) at ../../dix/main.c:287
        i = <value optimized out>
        alwaysCheckForInput = {0, 1}

[Paul Holcomb (noptys)]

Relevant code added by 500_xi2.1.patch

http://paste.ubuntu.com/747191/

[Bryce Harrington (bryce)]

I've opened tasks for natty, oneiric, and precise.

For precise, the xi2.1 is targeted for being completely rewritten. I expect that will "fix" the issue there. But that work will be too invasive to qualify as an SRU for natty or oneiric.