X11/GDM crash after using xrandr (Assertion `intel->batch->cliprect_mode != REFERENCES_CLIPRECTS' failed)

[Jonatan Schroeder]

I'm using Ubuntu Intrepid. I recently bought a new monitor to use with my Laptop (Acer Aspire 1642WLMi with Intel graphics card), and I'm using xrandr to switch to two monitors. The commands I use are:

xrandr --fb 1280x1824 --output LVDS --mode 1280x800 --output VGA --mode 1280x1024 --below LVDS --verbose

to turn the monitor on, and

xrandr --fb 1280x800 --output LVDS --mode 1280x800 --output VGA --off --verbose

to turn it off. The problem is that when I turn the monitor off, I return to the login screen, I'm assuming because X11 restarts. This doesn't happen all the times, it usually doesn't work when I have been working on a session for some time. Some errors I found in some logs:

/var/log/gdm/:0.log.2:
(EE) intel(0): underrun on pipe B!
Xorg: intel_context.c:1020: UNLOCK_HARDWARE: Assertion `intel->batch->cliprect_mode != REFERENCES_CLIPRECTS' failed.

/var/log/syslog:
Nov 14 15:30:15 ubuntujs gdm[11368]: WARNING: gdm_slave_xioerror_handler: Fatal X error - Restarting :0
Nov 14 15:30:16 ubuntujs acpid: client connected from 12651[0:0]
Nov 14 15:30:20 ubuntujs bonobo-activation-server (jonatan-12676): could not associate with desktop session: Failed to connect to socket /tmp/dbus-aCE1Pj1qUH: Connection refused

I don't know what extra files are required, please let me know if you need any extra information.

[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 915GM/PM/GMS/910GML Express Processor to DRAM Controller [8086:2590] (rev 03)
     Subsystem: Acer Incorporated [ALI] Device [1025:008f]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 03)
     Subsystem: Acer Incorporated [ALI] Device [1025:008f]

[Jonatan Schroeder (jonatanschroeder)]

Checking a little closer, it usually happens when some specific programs are open, like Firefox or some wine programs. When these are close, X doesn't restart.

[Bryce Harrington (bryce)]

[This is an automated message]

Hi jonatanschroeder,

Please attach the output of `lspci -vvnn`, and attach your /var/log/Xorg.0.log file from after reproducing this issue. If you've made any customizations to your /etc/X11/xorg.conf please attach that as well.

[Jonatan Schroeder (jonatanschroeder)]

I'm sending both Xorg.0.log and Xorg.0.log.old, as a new log was created when X11 was restarted.

[Jonatan Schroeder (jonatanschroeder)]

About xorg.conf, the error happens with both the original xorg.conf (using dpkg-reconfigure -phigh xserver-xorg) and this version (changed to avoid the screen to blink when I call xrandr). I'm attaching the modified version.

[ssergeje (ssergeje)]

Hello!
I can confirm the issue - disabling the external monitor crahses X, __when Visual Effects (compiz) are enabled__.

Prerequisites:
1 you have compiz turned on
2 my monitor setup is: external monitor is on (1440x900@60Hz), laptop screen is disabled (OFF)

Steps to reproduce in Gnome 'Screen Resolution' tool:
1 switch laptop screen ON (1024x768@60Hz)
2 turn external monitor OFF
3 Apply the modifications
Result - GDM/X crashes

Work around - if you disable the visual effects before reproducing the steps, everything will go just fine.

I'll add the xorg.conf, syslog, auth.log, :o.log.1 and lspci -vvnn as an attachment

hope that helps 8)

[Marius Gedminas (mgedmin)]

Reassigning to xserver-xorg-video-intel on the basis of that assertion error; besides, xrandr is a client program and cannot be responsible for *server* crashes.

[Marius Gedminas (mgedmin)]

Um, Google search results for 'UNLOCK_HARDWARE: Assertion `intel->batch->cliprect_mode != REFERENCES_CLIPRECTS' failed.', show that it's mesa code that's doing the assertion.

[Marius Gedminas (mgedmin)]

FWIW I get this error on Intel 965GM:

$ lspci -vvnn -s 02
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a02] (rev 0c)
 Subsystem: Lenovo Device [17aa:20b5]
 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 f8100000 (64-bit, non-prefetchable) [size=1M]
 Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
 Region 4: I/O ports at 1800 [size=8]
 Capabilities: <access denied>
 Kernel modules: intelfb

00:02.1 Display controller [0380]: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller [8086:2a03] (rev 0c)
 Subsystem: Lenovo Device [17aa:20b5]
 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
 Region 0: Memory at f8200000 (64-bit, non-prefetchable) [size=1M]
 Capabilities: <access denied>

[Elvis Stansvik (elvstone)]

I can confirm this on my Intrepid laptop. Unfortunately I don't have Jaunty to test with.

$ lspci -vvnn -s 02
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller [8086:27a2] (rev 03)
        Subsystem: Fujitsu Siemens Computers Device [1734:10ad]
        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 dc100000 (32-bit, non-prefetchable) [size=512K]
        Region 1: I/O ports at 1800 [size=8]
        Region 2: Memory at c0000000 (32-bit, prefetchable) [size=256M]
        Region 3: Memory at dc200000 (32-bit, non-prefetchable) [size=256K]
        Capabilities: <access denied>
        Kernel modules: intelfb

00:02.1 Display controller [0380]: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated GraphicsController [8086:27a6] (rev 03)
        Subsystem: Fujitsu Siemens Computers Device [1734:10ad]
        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
        Region 0: Memory at dc180000 (32-bit, non-prefetchable) [size=512K]
        Capabilities: <access denied>

[Jonatan Schroeder (jonatanschroeder)]

Seems like solved on Jaunty beta.

[Bryce Harrington (bryce)]

Thanks for letting us know the issue is resolved.