For me it's random, actions in all sorts of different applications seem to have
triggered it.
- using kubuntu (KDE 4.2) but I think I even had this problem in 3.5...
- The mouse cursor still tracks the mouse.
- Mouse clicks and keyboard input are ignored, requests to change VT are
ignored.
- The system itself is still up and running and I can log in remotely via ssh
to get things shut down from a full shell. On one occasion this was during a
kernel compile and I let that run for another 15 mins AFTER the console freeze,
and sure enough it finished correctly.
- Nothing on the display updates, even though there is still clearly activity.
eg amarok continues to play until the end of the current track, but amarok's
time display stops updating.
- A system shutdown will pause and not close the box down, because it is unable
to kill X - I have to intervene with a kill -9. Once I have killed X and
stopped the kdm service manually a "poweroff" will work correctly.
- Sometimes a distorted version of the kubuntu shutdown screen appears,
sometimes it doesn't.
- If you attempt to restart kdm after killing a dead X, a new X process will
run but doesn't appear on the screen. You will also see
"[drm:i915_gem_entervt_ioctl] *ERROR* Reenabling wedged hardware, good luck" in
syslog.
I am on a MSI Wind / Advent 4211.
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GME Express
Integrated Graphics Controller (rev 03)
Subsystem: Micro-Star International Co., Ltd. Device 0110
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 16
Region 0: Memory at dfe80000 (32-bit, non-prefetchable) [size=512K]
Region 1: I/O ports at d0f0 [size=8]
Region 2: Memory at c0000000 (32-bit, prefetchable) [size=256M]
Region 3: Memory at dff00000 (32-bit, non-prefetchable) [size=256K]
Capabilities: <access denied>
Kernel modules: intelfb
--
Xorg hard-locks randomly, mouse still works; Intel X3100
https://bugs.launchpad.net/bugs/345119
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