Bug#689748: Additional info, another backtrace.
Hello,
More symptoms:
When an application puts out text to the console (in my case fsck on a
usb drive reporting I/O errors) random dots appear, sometimes all over
the screen. Sometimes, the text on the screen is totally unreadable.
Shifting consoles (ctl-alt-Fn) redraws the screen and the text is
readable again and the random dots disappear. This is strictly on the
text consoles. Kdm is waiting for login on console 7.
In the windowing environment, kde upon startup claims that there is a
problem with the GL library and thus it's not being used.
The kde crash handler provided the following backtrace:
Application: KWin (kwin), signal: Segmentation fault
Using host libthread_db library "/lib/i386-linux-gnu/i686/cmov/libthread_db.so.1".
[KCrash Handler]
#6 0xaebfc569 in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#7 0xaec1d890 in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#8 0xaec1d93a in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#9 0xaed462d4 in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#10 0xaebfb7dc in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#11 0xaec0ff88 in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#12 0xaebfb838 in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#13 0xaebf7fda in ?? () from /usr/lib/i386-linux-gnu/dri/nouveau_vieux_dri.so
#14 0xb643444a in ?? () from /usr/lib/i386-linux-gnu/libGL.so.1
#15 0xb640b3c8 in glXDestroyContext () from /usr/lib/i386-linux-gnu/libGL.so.1
#16 0xb76984b6 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#17 0xb7698dd2 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#18 0xb7619808 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#19 0xb761e5d0 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#20 0xb7616996 in ?? () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#21 0xb7618951 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_kwin.so
#22 0x0804861b in ?? ()
#23 0xb7461e46 in __libc_start_main (main=0x8048600, argc=1, ubp_av=0xbfa46384, init=0x8048730 <__libc_csu_init>, fini=0x8048720 <__libc_csu_fini>, rtld_fini=0xb7727590, stack_end=0xbfa4637c) at libc-start.c:228
#24 0x08048641 in _start ()
I don't believe this nvidia chip does direct rendering. It does other types
of acceleration.
Other times, the windowing system freezes completely. The only thing that can
be done is login via ssh and shutdown the machine. Killing -9 the kde
processes doesn't work. Shifting consoles doesn't work. These freezing
episodes have been triggered by attempting to move a konsole window (the
frame then gets this random-dots look and everything stops), by attempting an
operation on the panel (menus popping up) or by trying to get a menu by
clicking on the konsole border.
I hope this is helpful...
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