[ubuntu-x] Ibex x server a little TOO hot-pluggy?

[Dan Kegel]

On Mon, Nov 3, 2008 at 11:23 AM, Dan Kegel <dank at kegel.com> wrote:
>> Something is definitely crashing either X or the kernel and causing X to
>> restart.  So that's certainly one issue you'll want to investigate.

Found it: https://bugs.freedesktop.org/show_bug.cgi?id=13952

By using startx, or with tail -f on Xorg.log (it rolls over too
quickly otherwise), I see

(II) intel(0): DDCModeFromDetailedTiming: 1024x768 Warning: We only
handle seperate sync.

Backtrace:
0: /usr/X11R6/bin/X(xf86SigHandler+0x79) [0x80c3009]
1: [0xb7fea400]
2: /usr/X11R6/bin/X(VidModeGetNumOfModes+0x40) [0x80c8270]
3: /usr/lib/xorg/modules/extensions//libextmod.so [0xb7b340d0]
4: /usr/X11R6/bin/X(Dispatch+0x34f) [0x808c89f]
5: /usr/X11R6/bin/X(main+0x47d) [0x8071d1d]
6: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe5) [0xb7bf1685]
7: /usr/X11R6/bin/X [0x8071101]
Saw signal 11.  Server aborting.

Sadly, even with every xorg*-dbg package installed, I see no
line numbers in the stack dump.

Here's how to reproduce:
run any Wine conformance test that creates a window
while the monitor is unplugged.  For instance,
 $ cd dlls/user32/tests
 $ rm static.ok
 $ make static.ok
will run fine with the cable plugged in, and crash with it unplugged.

Wine's log file, generated with WINEDEBUG=+all,+synchronous make test,
seems to indicate the crash is generated very quickly after
wine starts using X, probably while it is getting a list of
video modes:

0018:trace:module:load_dll Found L"C:\\windows\\system32\\winex11.drv"
for L"winex11.drv" at 0x60a70000, count=2
...
0018:trace:x11settings:X11DRV_Settings_SetHandlers Resolution settings
now handled by: NoRes
0018:trace:x11settings:X11DRV_Settings_SetHandlers Initialized new
display modes array
0018:trace:x11settings:X11DRV_Settings_AddOneMode initialized mode 0:
1400x1050x32 @60 Hz (NoRes)
make: *** wait: No child processes.  Schluss.
make: *** Warte auf noch nicht beendete Prozesse...
make: *** wait: No child processes.  Schluss.
0009: *killed* exit_code=0
0008: *process killed*
XIO:  fatal IO error 11 (Resource temporarily unavailable) on X server ":0.0"
      after 86 requests (85 known processed) with 0 events remaining.

I am at your disposal if you need me to test a fix.
Otherwise I'm off to the store to buy an nvidia card :-)
- Dan