Bug#1115085: Xorg crashes on switch from Greeter to LXDE

[Gerald Hollfelder <gho@gmx.de>]

Package: xorg
Version: 7.7+24

Since I upgraded from Debian 12 to 13, Xorg crashes after login and
the system returns to the greeter (lightdm-gtk-greeter).

Xorg.0.log.old:[  1205.148] (EE) Backtrace:
Xorg.0.log.old:[  1205.152] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.152] (EE) 0: /usr/lib/xorg/Xorg (?+0x0) [0x55fcbc266c6d]
Xorg.0.log.old:[  1205.153] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.153] (EE) 1: /lib/x86_64-linux-gnu/libc.so.6
(?+0x0) [0x7eff9a5f7df0]
Xorg.0.log.old:[  1205.154] (EE) 2:
/lib/x86_64-linux-gnu/libpciaccess.so.0
(pci_device_vgaarb_set_target+0x113) [0x7eff9aaf79b3]
Xorg.0.log.old:[  1205.155] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.155] (EE) 3: /usr/lib/xorg/Xorg (?+0x0) [0x55fcbc146a80]
Xorg.0.log.old:[  1205.155] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.155] (EE) 4: /usr/lib/xorg/Xorg (?+0x0) [0x55fcbc129bd8]
Xorg.0.log.old:[  1205.156] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.156] (EE) 5: /usr/lib/xorg/Xorg (?+0x0) [0x55fcbc19f616]
Xorg.0.log.old:[  1205.156] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.156] (EE) 6: /usr/lib/xorg/Xorg (?+0x0) [0x55fcbc19f6fd]
Xorg.0.log.old:[  1205.156] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.156] (EE) 7: /usr/lib/xorg/Xorg (?+0x0) [0x55fcbc0e9c0b]
Xorg.0.log.old:[  1205.157] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.157] (EE) 8: /usr/lib/xorg/Xorg (?+0x0) [0x55fcbc0edcd4]
Xorg.0.log.old:[  1205.158] (EE) unw_get_proc_name failed: no unwind
info found [-10]
Xorg.0.log.old:[  1205.158] (EE) 9: /lib/x86_64-linux-gnu/libc.so.6
(?+0x0) [0x7eff9a5e1ca8]
Xorg.0.log.old:[  1205.158] (EE) 10: /lib/x86_64-linux-gnu/libc.so.6
(__libc_start_main+0x85) [0x7eff9a5e1d65]
Xorg.0.log.old:[  1205.159] (EE) 11: /usr/lib/xorg/Xorg (_start+0x21)
[0x55fcbc0d6641]
Xorg.0.log.old:[  1205.159] (EE)
Xorg.0.log.old:[  1205.159] (EE) Segmentation fault at address 0x30
Xorg.0.log.old:[  1205.159] (EE)
Xorg.0.log.old:[  1205.159] (EE) Caught signal 11 (Segmentation
fault). Server aborting

System:
  Host: xxxxxxxx Kernel: 6.12.43+deb13-amd64 arch: x86_64 bits: 64
  Console: pty pts/1 Distro: Debian GNU/Linux 13 (trixie)
Machine:
  Type: Laptop System: Hewlett-Packard product: HP Compaq nc6320
(RH383EA#ABD) v: F.0E
CPU:
  Info: dual core Intel Core2 T7200 [MCP] speed (MHz): avg: 1000
min/max: 1000/2000
Graphics:
  Device-1: Intel Mobile 945GM/GMS 943/940GML Express Integrated
Graphics driver: i915 v: kernel
  Display: unspecified server: X.org v: 1.21.1.16 driver: X: loaded: intel
    unloaded: fbdev,modesetting,vesa dri: i915 gpu: i915 tty: 167x33
resolution: 1400x1050
  API: OpenGL v: 4.5 compat-v: 2.1 vendor: mesa v: 25.0.7-2 note:
console (EGL sourced)
    renderer: i915 (: 945GM), llvmpipe (LLVM 19.1.7 128 bits)
  Info: Tools: api: eglinfo,glxinfo x11: xdriinfo, xdpyinfo, xprop, xrandr