[Xen-devel] qemu disappear when installing windows guest (sdl=1)

["Xu, Dongxiao" <dongxiao.xu@xxxxxxxxx>]

Hi, Samuel and Stefano, 
      When I install windows xp guest on latest Xen, the qemu window
will sometimes disappear at the secondary boot or at the time when
installation has 35 minutes left (sdl=1). This issue doesn't happen
every time. And if I use vnc to install the guest, the installation
could pass successfully. When the qemu window disappears, I use gdb to
attach it, and get the following call traces:

1) When qemu disappears at the secondary boot:
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47935248716144 (LWP 3533)]
0x0000003eaa609924 in XShmPutImage () from /usr/lib64/libXext.so.6
(gdb) bt
#0  0x0000003eaa609924 in XShmPutImage () from /usr/lib64/libXext.so.6
#1  0x0000003ebb03f309 in SDL_LoadObject () from
/usr/lib64/libSDL-1.2.so.0
#2  0x0000003ebb03d297 in SDL_LoadObject () from
/usr/lib64/libSDL-1.2.so.0
#3  0x0000003ebb01146b in SDL_PumpEvents () from
/usr/lib64/libSDL-1.2.so.0
#4  0x000000000047e678 in sdl_resize_shared (ds=0x6de7a0, w=640, h=480, 
    depth=24, linesize=2048, pixels=0x2aaaac2b4000)
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/sdl.c:243
#5  0x00000000004417b1 in vga_draw_graphic (s=0xabc888, full_update=1)
    at ../vl.h:967
#6  0x0000000000442752 in vga_update_display (opaque=<value optimized
out>)
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/hw/vga.c:1810
#7  0x000000000040ff9f in vga_hw_update ()
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/console.c:149
#8  0x000000000047e880 in sdl_refresh (ds=0x6de7a0)
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/sdl.c:553
#9  0x0000000000409da8 in gui_update (opaque=<value optimized out>)
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/vl.c:6129
#10 0x0000000000405cd8 in qemu_run_timers (ptimer_head=0x6de860, 
    current_time=59253125)
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/vl.c:918
#11 0x0000000000409d7a in main_loop_wait (timeout=10)
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/vl.c:6386
#12 0x0000000000486195 in main_loop ()
---Type <return> to continue, or q <return> to quit---
    at
/home/chc/acpi/xen-3.3-unstable/tools/ioemu/target-i386-dm/helper2.c:549
#13 0x000000000040d264 in main (argc=20, argv=0x7fffdf99dab8)
    at /home/chc/acpi/xen-3.3-unstable/tools/ioemu/vl.c:798


2) Qemu disappears when the installation has 35 minutes left.
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 47442692260208 (LWP 8063)]
0x0000003eaa609924 in XShmPutImage () from /usr/lib64/libXext.so.6
(gdb) bt
#0  0x0000003eaa609924 in XShmPutImage () from /usr/lib64/libXext.so.6
#1  0x0000003ebb03f309 in SDL_LoadObject () from
/usr/lib64/libSDL-1.2.so.0
#2  0x0000003ebb03d297 in SDL_LoadObject () from
/usr/lib64/libSDL-1.2.so.0
#3  0x0000003ebb01146b in SDL_PumpEvents () from
/usr/lib64/libSDL-1.2.so.0
#4  0x000000000047df9e in sdl_resize ()
#5  0x00000000004400f1 in vga_draw_graphic ()
#6  0x000000000047e29b in sdl_refresh ()
#7  0x000000000040a0ec in gui_update ()
#8  0x0000000000405d7c in qemu_run_timers ()
#9  0x000000000040a09b in main_loop_wait ()
#10 0x0000000000485b6a in main_loop ()
#11 0x000000000040d325 in main ()


Best Regards,
-- Dongxiao


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