Thanks for the backtrace Philippe. This indicates what function the
crash occurred, however doesn't give us much in the way of state. The
crashes are definitely happening in xserver code rather than in the
driver, which is good in a way since we may have a chance at solving it,
but it would be helpful to have the additional information a full
backtrace would provide. Could you please install the dbg packages for
xserver, reproduce the crash in gdb, and collect a 'backtrace full'?
See http://wiki.ubuntu.com/X/Backtracing for more guidance.
** Summary changed:
- Xephyr crashes with Segmentation fault on LPIA arch
+ Xephyr crashes with Segmentation fault in fbOddTile/memcpy() on LPIA arch
** Description changed:
When trying to run `xephyr :1` on Intrepid LPIA, the Xephyr window shows
up but then crashes immediately. This is a completely new virtual
machine built with the command
ubuntu-vm-builder kvm intrepid -v --arch lpia --debug
This is more information about the setup;
uname -a
Linux ubuntu 2.6.24-4-lpia #1 SMP Fri Oct 24 13:13:03 UTC 2008 i686 GNU/Linux
ii xserver-xephyr 2:1.5.2-2ubuntu3 nested X server
The short backtrace I get is:
0: Xephyr(KdBacktrace+0x27) [0x80b1a67]
1: [0xb80b0400]
2: Xephyr(fbOddTile+0xf6) [0x80d48c6]
3: Xephyr(fbTile+0x60) [0x80d4970]
4: Xephyr(fbFill+0x28a) [0x80cca0a]
5: Xephyr(fbPolyRect+0x1a7) [0x80ccdb7]
6: Xephyr [0x8174705]
7: Xephyr(miPaintWindow+0x221) [0x80e3971]
8: Xephyr(miWindowExposures+0x138) [0x80e3cd8]
9: Xephyr(MapWindow+0x2a7) [0x8093c27]
10: Xephyr(InitRootWindow+0xe5) [0x8093e35]
11: Xephyr(main+0x41d) [0x808e80d]
12: /lib/libc.so.6(__libc_start_main+0xd5) [0xb7c2a675]
13: Xephyr [0x8070391]
+
+ [backtrace]
+ #0 0xb7b2d196 in memcpy () from /lib/libc.so.6
+ #1 0x08ce59d8 in ?? ()
+ #2 0x080d48c6 in fbOddTile ()
+ #3 0x080d4970 in fbTile ()
+ #4 0x080cca0a in fbFill ()
+ #5 0x080ccdb7 in fbPolyFillRect ()
+ #6 0x08174705 in ?? ()
+ #7 0x080e3971 in miPaintWindow ()
+ #8 0x080e3cd8 in miWindowExposures ()
+ #9 0x08093c27 in MapWindow ()
+ #10 0x08093e35 in InitRootWindow ()
+ #11 0x0808e80d in main ()
+ (gdb) info registers
+ eax 0x0 0
+ ecx 0x4 4
+ edx 0x1 1
+ ebx 0x81e7ff4 136216564
+ esp 0xbfc70dd8 0xbfc70dd8
+ ebp 0xbfc70ec8 0xbfc70ec8
+ esi 0x8ce59d8 147741144
+ edi 0xb79dc000 -1214398464
+ eip 0xb7b2d196 0xb7b2d196 <memcpy+70>
+ eflags 0x210246 [ PF ZF IF RF ID ]
+ cs 0x73 115
+ ss 0x7b 123
+ ds 0x7b 123
+ es 0x7b 123
+ fs 0x0 0
+ gs 0x33 51
+ (gdb) thread apply all backtrace
+
+ Thread 1 (Thread 0xb79f46c0 (LWP 3786)):
+ #0 0xb7b2d196 in memcpy () from /lib/libc.so.6
+ #1 0x08ce59d8 in ?? ()
+ #2 0x080d48c6 in fbOddTile ()
+ #3 0x080d4970 in fbTile ()
+ #4 0x080cca0a in fbFill ()
+ #5 0x080ccdb7 in fbPolyFillRect ()
+ #6 0x08174705 in ?? ()
+ #7 0x080e3971 in miPaintWindow ()
+ #8 0x080e3cd8 in miWindowExposures ()
+ #9 0x08093c27 in MapWindow ()
+ #10 0x08093e35 in InitRootWindow ()
+ #11 0x0808e80d in main ()
+ (gdb) quit
** Changed in: xorg-server (Ubuntu)
Status: Confirmed => Incomplete
--
Xephyr crashes with Segmentation fault in fbOddTile/memcpy() on LPIA arch
https://bugs.launchpad.net/bugs/298868
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