Re: X locks up after a random time

See Als :
https://bugzilla.redhat.com/show_bug.cgi?id=464866 : Xorg lockup with
i945: "EQ overflowing. The server is probably stuck in an infinite
loop."

https://bugs.freedesktop.org/show_bug.cgi?id=14633 X freezes with
Composite and Mouse Wheel, mouse moves, no... (with Nvidia Proprietary
Driver)

2009-01-03 (토), 01:36 +0100, Marko Vojinovic 쓰시길:

> Ok, this is a Fujitsu Siemens Esprimo U9200, with Intel graphics, F10 64bit,
> updated last week. KDE desktop, compiz and all, but I believe it is not
> related.
>
> The symptom: system boots up regularly, I do regular work, and after a random
> amount of time, X freezes. If compiz is on, all I can do is move the mouse
> pointer. If compiz is off, even the mouse pointer is frozen. The OS itself is
> not, I can ssh from a remote machine and read logs. This is not reproducible,
> it happens too randomly and I can only sit and wait for it to happen.
> However, it is extremely annoying, since it has a tendency to freeze when I'm
> in the middle of some work in progress.
>
> If I log in remotely and kill -9 the X process, the whole machine locks up and
> I can only power-cycle it. Don't know a way to restart X short of rebooting,
> keyboard doesn't respond to ctrl-alt-backspace or anything else.
>
> So far, dmesg and /var/log/messages do not show anything related or even
> suspicious (afaics), while /var/log/Xorg.0.log shows this at the end:
>
> =================
> [snip most of the regular log of a working X server]
>
> (II) intel(0): EDID for output TMDS-1
> (II) intel(0): EDID for output TV
> [mi] EQ overflowing. The server is probably stuck in an infinite loop.
>
> Backtrace:
> 0: /usr/bin/X(xorg_backtrace+0x26) [0x4e7a26]
> 1: /usr/bin/X(mieqEnqueue+0x291) [0x4c8591]
> 2: /usr/bin/X(xf86PostMotionEventP+0xc4) [0x491494]
> 3: /usr/bin/X(xf86PostMotionEvent+0xa9) [0x491669]
> 4: /usr/lib64/xorg/modules/input//evdev_drv.so [0x7feeeaf3e126]
> 5: /usr/bin/X [0x47a765]
> 6: /usr/bin/X [0x46b307]
> 7: /lib64/libc.so.6 [0x3522232f90]
> 8: /lib64/libc.so.6(ioctl+0x7) [0x35222de037]
> 9: /usr/lib64/libdrm.so.2 [0x7feefd045023]
> 10: /usr/lib64/libdrm.so.2(drmCommandNone+0x16) [0x7feefd045326]
> 11: /usr/lib64/xorg/modules/drivers//intel_drv.so [0x7feefcdd0fc8]
> 12: /usr/bin/X [0x51cdb9]
> 13: /usr/bin/X [0x4f7311]
> 14: /usr/bin/X(BlockHandler+0x50) [0x44a320]
> 15: /usr/bin/X(WaitForSomething+0x161) [0x4e4eb1]
> 16: /usr/bin/X(Dispatch+0x7f) [0x4465ef]
> 17: /usr/bin/X(main+0x45d) [0x42cd1d]
> 18: /lib64/libc.so.6(__libc_start_main+0xe6) [0x352221e576]
> 19: /usr/bin/X [0x42c0f9]
> [mi] mieqEnequeue: out-of-order valuator event; dropping.
> [mi] EQ overflowing. The server is probably stuck in an infinite loop.
>
> [the last two lines repeat a lot of times]
> =================
>
> So if the server is really in an infinite loop, then something so very Not
> Good is happening. Now, given that these are Intel open-source drivers
> driving my graphics card here, I have the following questions:
>
> 1) What does the [mi] stand for here? Can anyone decypher the backtrace for
> me? (I don't mind reading a "too technical" answer)
> 2) How can I further diagnose the problem and help fixing it?
> 3) In order to be efficient in diagnosing, does anyone know how to trigger the
> lockup on purpose?
> 4) This has been happening since I installed F10 on this machine --- has
> anyone spotted the problem already? Is there a known bugzilla report that I
> can add to?
> 5) Is there a workaround until a fix comes?
> 6) Can I somehow restart the X server from a remote console (without rebooting
> the whole machine) to recover clean from this?
> 7) F10 is out for a while now, how come a bug such as this (X in infinite
> loop) has not been fixed already? I mean, many people here bragg about the
> open source drivers being better then closed source when it comes to fixing
> broken things, so why is an issue such as this still present?
> // ok, this is a rant, I know, but I really am frustrated by this //
>
> Oh yes, lspci -v says this:
>
> 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960
> Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
>         Subsystem: Fujitsu Siemens Computers Device 110f
>         Flags: bus master, fast devsel, latency 0, IRQ 16
>         Memory at fc000000 (64-bit, non-prefetchable) [size=1M]
>         Memory at d0000000 (64-bit, prefetchable) [size=256M]
>         I/O ports at 18f8 [size=8]
>         Capabilities: [90] Message Signalled Interrupts: Mask- 64bit-
> Count=1/1 Enable-
>         Capabilities: [d0] Power Management version 3
>         Kernel modules: intelfb
>
> 00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated
> Graphics Controller (rev 03)
>         Subsystem: Fujitsu Siemens Computers Device 110f
>         Flags: bus master, fast devsel, latency 0
>         Memory at fc100000 (64-bit, non-prefetchable) [disabled] [size=1M]
>         Capabilities: [d0] Power Management version 3
>
> There is no /etc/X11/xorg.conf file, default stuff...
>
> Help please?