Comment 0 for bug 373121

I notified in some condition segfaulting of system-config-printer and tryed to strace it. But after adding -v option, I get locked desktop on some point of system-config-printer starting up. This point is not static. Nothing is working in GUI except mouse moving, keyboard LEDs react on *Lock keys pressed, and I cat switch to console to kill strace. And 'kill -9 `pidof strace`' is needed to terminate it. After kill, desktop back to functional, and system-config-printer show up and runs. While lockup, programs seems to continue its work (for example, vlc still playing a radio), CPU load is low as normal.

Example of console output on strace after kill:

read(4, "\1\1\245\1\0\0\0\0\374\0\0\0\323\0`\1\200\1\266\2\200\1\235\2\20\0\0\0\20\252\327\t"..., 4096) = 32
read(4, 0x90e2cc0, 4096) = -1 EAGAIN (Resource temporarily unavailable)
select(5, [4], [4], NULL, NULL) = 1 (out [4])
writev(4, [{"&\0\2\0\323\0`\1"..., 8}, {NULL, 0}, {""..., 0}], 3) = 8
select(5, [4], [], NULL, NULL) = 1 (in [4])
read(4, "\1\1\246\1\0\0\0\0\374\0\0\0\330\0`\1\200\1\266\2\200\1\205\2\20\0\0\0\20\2Killed

Videocard: VGA compatible controller: VIA Technologies, Inc. CN896/VN896/P4M900 [Chrome 9 HC] (rev 01) (no kernel module driver used), Xorg.log for video:

(--) PCI:*(0@1:0:0) VIA Technologies, Inc. CN896/VN896/P4M900 [Chrome 9 HC] rev 1, Mem @ 0xf4000000/67108864, 0xfb000000/16777216, BIOS @ 0x????????/65536
...
(II) Module openchrome: vendor="http://openchrome.org/"
        compiled for 1.5.99.902, module version = 0.2.903
        Module class: X.Org Video Driver
        ABI class: X.Org Video Driver, version 5.0
(II) OPENCHROME: Driver for VIA Chrome chipsets: CLE266, KM400/KN400,
        K8M800/K8N800, PM800/PM880/CN400, P4M800Pro/VN800/CN700,
        K8M890/K8N890, P4M900/VN896/CN896, CX700/VX700, P4M890, VX800
(II) Primary Device is: PCI 01@00:00:0
(!!) VIA Technologies does not support this driver in any way.

I can't determine, is OpenChrome driver is used. Attaching full log.

How can I determine a bug? Any suggestions?