Hello,
    
        
    I'm using debian-testing
      and from about 2 weeks ago gnome sessions are killed several 
      times per day.
    In syslog I see the following stacktrace:
    Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Backtrace:
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 0:
      /usr/lib/xorg/Xorg (xorg_backtrace+0x52) [0x80285672]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 1:
      /usr/lib/xorg/Xorg (0x800dd000+0x1ac5e2) [0x802895e2]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 2:
      linux-gate.so.1 (__kernel_rt_sigreturn+0x0) [0xb76f0cfc]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 3:
      /usr/lib/i386-linux-gnu/dri/i965_dri.so (0xb6339000+0x3ce376)
      [0xb6707376]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 4:
      /usr/lib/i386-linux-gnu/dri/i965_dri.so (0xb6339000+0x3ce9a8)
      [0xb67079a8]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 5:
      /usr/lib/i386-linux-gnu/dri/i965_dri.so (0xb6339000+0x3bcdd7)
      [0xb66f5dd7]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 6:
      /usr/lib/i386-linux-gnu/dri/i965_dri.so (0xb6339000+0x3a3b33)
      [0xb66dcb33]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 7:
      /usr/lib/i386-linux-gnu/dri/i965_dri.so (0xb6339000+0x182679)
      [0xb64bb679]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 8:
      /usr/lib/xorg/modules/libglamoregl.so (0xb6bd7000+0x17532)
      [0xb6bee532]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 9:
      /usr/lib/xorg/Xorg (0x800dd000+0x12c4c0) [0x802094c0]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 10:
      /usr/lib/xorg/modules/libglamoregl.so (0xb6bd7000+0x21c37)
      [0xb6bf8c37]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 11:
      /usr/lib/xorg/modules/libglamoregl.so (0xb6bd7000+0x21b3d)
      [0xb6bf8b3d]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 12:
      /usr/lib/xorg/Xorg (0x800dd000+0x1203f3) [0x801fd3f3]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 13:
      /usr/lib/xorg/Xorg (0x800dd000+0x3af01) [0x80117f01]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 14:
      /usr/lib/xorg/Xorg (0x800dd000+0x3f221) [0x8011c221]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 15:
      /usr/lib/xorg/Xorg (0x800dd000+0x288aa) [0x801058aa]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 16:
      /lib/i386-linux-gnu/libc.so.6 (__libc_start_main+0xf6)
      [0xb7173276]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE) 17:
      /usr/lib/xorg/Xorg (0x800dd000+0x288e8) [0x801058e8]
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Segmentation fault at address 0xc
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: Fatal
      server error:
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Caught signal 11 (Segmentation fault). Server aborting
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: Please
      consult the The X.Org Foundation support
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: #011 at
      http://wiki.x.org
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]:  for
      help.
      Jan 20 23:43:51 debian /usr/lib/gdm3/gdm-x-session[2454]: (EE)
      Please also check the log file at
      "/home/karol/.local/share/xorg/Xorg.0.log" for additional
      information.
    
    
    the packages are up to date.
    I'm using Lenovo Thinkpad Carbon 4
    
    
    Regards, Karol Szk