Ok, thanks! However there was nothing in my /var/crash folder. Nonetheless I tried to file a new bug with ubuntu-bug xorg. It added lots of system information and logs.
here it is: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1754296 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1754177 Title: [bionic] xserver / startx crashes with Composite Disabled in xorg.conf Status in xorg-server package in Ubuntu: Incomplete Bug description: For certain games I disable the Composite extension in my /etc/X11/xorg.conf when using a non-composited window manager like openbox, fluxbox or marco. This worked flawlessly in all previous Ubuntu versions including 17.10 (artful). This stopped working with Ubuntu 18.04 (bionic). I tested with the mainline kernel 4.16 and the current 4.15 kernel in bionic-proposed and bionic. Xserver will crash with "Option "Composite" "0/False/Disable" When I comment out the specific line in the Extensions section (that means *enabling* Composite) it works again with this xorg.conf. I can also do other stuff like disabling DRI3 or AIGLX. No crashes in these cases. My xorg.conf: Section "Device" Identifier "Intel GMA45" ##just a trivial name as Identifier Driver "intel" EndSection Section "Extensions" Option "Composite" "0" EndSection It has a backtrace and caughts signal 6. My Xorg.0.log: [ 35.779] X.Org X Server 1.19.6 Release Date: 2017-12-20 [ 35.781] X Protocol Version 11, Revision 0 [ 35.782] Build Operating System: Linux 4.4.0-101-generic x86_64 Ubuntu [ 35.783] Current Operating System: Linux bdcomputerclub 4.16.0-994-generic #201803022100 SMP Sat Mar 3 02:03:37 UTC 2018 x86_64 [ 35.784] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-4.16.0-994-generic root=UUID=cb2eb60a-9760-4805-95eb-0db77947ac82 ro quiet splash [ 35.787] Build Date: 22 February 2018 08:04:42PM [ 35.788] xorg-server 2:1.19.6-1ubuntu2 (For technical support please see http://www.ubuntu.com/support) [ 35.789] Current version of pixman: 0.34.0 [ 35.792] Before reporting problems, check http://wiki.x.org to make sure that you have the latest version. [ 35.792] Markers: (--) probed, (**) from config file, (==) default setting, (++) from command line, (!!) notice, (II) informational, (WW) warning, (EE) error, (NI) not implemented, (??) unknown. [ 35.799] (==) Log file: "/home/christian/.local/share/xorg/Xorg.0.log", Time: Wed Mar 7 22:43:35 2018 [ 35.801] (==) Using config file: "/etc/X11/xorg.conf" [ 35.803] (==) Using system config directory "/usr/share/X11/xorg.conf.d" [ 35.803] (==) No Layout section. Using the first Screen section. [ 35.803] (==) No screen section available. Using defaults. [ 35.803] (**) |-->Screen "Default Screen Section" (0) [ 35.803] (**) | |-->Monitor "<default monitor>" [ 35.804] (==) No device specified for screen "Default Screen Section". Using the first device section listed. [ 35.804] (**) | |-->Device "Intel GMA45 Express Chipset" [ 35.804] (==) No monitor specified for screen "Default Screen Section". Using a default monitor configuration. [ 35.804] (==) Automatically adding devices [ 35.804] (==) Automatically enabling devices [ 35.804] (==) Automatically adding GPU devices [ 35.804] (==) Automatically binding GPU devices [ 35.804] (==) Max clients allowed: 256, resource mask: 0x1fffff [ 35.809] (WW) The directory "/usr/share/fonts/X11/cyrillic" does not exist. [ 35.809] Entry deleted from font path. [ 35.822] (==) FontPath set to: /usr/share/fonts/X11/misc, /usr/share/fonts/X11/100dpi/:unscaled, /usr/share/fonts/X11/75dpi/:unscaled, /usr/share/fonts/X11/Type1, /usr/share/fonts/X11/100dpi, /usr/share/fonts/X11/75dpi, built-ins [ 35.822] (==) ModulePath set to "/usr/lib/xorg/modules" [ 35.822] (**) Extension "Composite" is disabled [ 35.822] (II) The server relies on udev to provide the list of input devices. If no devices become available, reconfigure udev or disable AutoAddDevices. [ 35.822] (II) Loader magic: 0x55cfd2964020 [ 35.822] (II) Module ABI versions: [ 35.822] X.Org ANSI C Emulation: 0.4 [ 35.822] X.Org Video Driver: 23.0 [ 35.822] X.Org XInput driver : 24.1 [ 35.822] X.Org Server Extension : 10.0 [ 35.824] (++) using VT number 1 [ 35.827] (II) systemd-logind: took control of session /org/freedesktop/login1/session/_32 [ 35.828] (II) xfree86: Adding drm device (/dev/dri/card0) [ 35.829] (II) systemd-logind: got fd for /dev/dri/card0 226:0 fd 11 paused 0 [ 35.832] (--) PCI:*(0:0:2:0) 8086:2a42:1025:0459 rev 9, Mem @ 0xd0000000/4194304, 0xc0000000/268435456, I/O @ 0x000050f0/8, BIOS @ 0x????????/131072 [ 35.832] (--) PCI: (0:0:2:1) 8086:2a43:1025:0459 rev 9, Mem @ 0xd3400000/1048576 [ 35.833] (II) LoadModule: "glx" [ 35.836] (II) Loading /usr/lib/xorg/modules/extensions/libglx.so [ 35.850] (II) Module glx: vendor="X.Org Foundation" [ 35.850] compiled for 1.19.6, module version = 1.0.0 [ 35.850] ABI class: X.Org Server Extension, version 10.0 [ 35.850] (II) LoadModule: "intel" [ 35.850] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so [ 35.856] (II) Module intel: vendor="X.Org Foundation" [ 35.856] compiled for 1.19.5, module version = 2.99.917 [ 35.856] Module class: X.Org Video Driver [ 35.856] ABI class: X.Org Video Driver, version 23.0 [ 35.856] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets: i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45, 4 Series, G45/G43, Q45/Q43, G41, B43 [ 35.856] (II) intel: Driver for Intel(R) HD Graphics [ 35.856] (II) intel: Driver for Intel(R) Iris(TM) Graphics [ 35.856] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics [ 35.856] xf86EnableIOPorts: failed to set IOPL for I/O (Operation not permitted) [ 35.858] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20180221 [ 35.858] (II) intel(0): SNA compiled: xserver-xorg-video-intel 2:2.99.917+git20171229-1 (Timo Aaltonen <tjaal...@debian.org>) [ 35.858] (II) intel(0): SNA compiled for use with valgrind [ 35.876] (WW) VGA arbiter: cannot open kernel arbiter, no multi-card support [ 35.877] (--) intel(0): Integrated Graphics Chipset: Intel(R) GM45 [ 35.877] (--) intel(0): CPU: x86-64, sse2, sse3, ssse3; using a maximum of 2 threads [ 35.877] (II) intel(0): Creating default Display subsection in Screen section "Default Screen Section" for depth/fbbpp 24/32 [ 35.878] (==) intel(0): Depth 24, (--) framebuffer bpp 32 [ 35.878] (==) intel(0): RGB weight 888 [ 35.878] (==) intel(0): Default visual is TrueColor [ 35.880] (II) intel(0): Output LVDS1 has no monitor section [ 35.894] (**) intel(0): Found backlight control interface intel_backlight (type 'raw') for output LVDS1 [ 35.894] (II) intel(0): Enabled output LVDS1 [ 35.894] (II) intel(0): Output VGA1 has no monitor section [ 35.894] (II) intel(0): Enabled output VGA1 [ 35.894] (II) intel(0): Output DP1 has no monitor section [ 35.894] (II) intel(0): Enabled output DP1 [ 35.894] (--) intel(0): Using a maximum size of 256x256 for hardware cursors [ 35.894] (II) intel(0): Output VIRTUAL1 has no monitor section [ 35.894] (II) intel(0): Enabled output VIRTUAL1 [ 35.895] (--) intel(0): Output LVDS1 using initial mode 1366x768 on pipe 0 [ 35.895] (==) intel(0): TearFree disabled [ 35.895] (==) intel(0): Using gamma correction (1.0, 1.0, 1.0) [ 35.895] (==) intel(0): DPI set to (96, 96) [ 35.895] (II) Loading sub module "dri3" [ 35.895] (II) LoadModule: "dri3" [ 35.895] (II) Module "dri3" already built-in [ 35.895] (II) Loading sub module "dri2" [ 35.895] (II) LoadModule: "dri2" [ 35.895] (II) Module "dri2" already built-in [ 35.895] (II) Loading sub module "present" [ 35.895] (II) LoadModule: "present" [ 35.895] (II) Module "present" already built-in [ 35.895] (==) Depth 24 pixmap format is 32 bpp [ 35.901] (II) intel(0): SNA initialized with Eaglelake (gen4.5) backend [ 35.901] (==) intel(0): Backing store disabled [ 35.901] (==) intel(0): Silken mouse enabled [ 35.902] (II) intel(0): HW Cursor enabled [ 35.902] (II) intel(0): RandR 1.2 enabled, ignore the following RandR disabled message. [ 35.903] (==) intel(0): DPMS enabled [ 35.904] (==) intel(0): Display hotplug detection enabled [ 35.904] (II) intel(0): [XvMC] xvmc_vld driver initialized. [ 35.904] (II) intel(0): [DRI2] Setup complete [ 35.904] (II) intel(0): [DRI2] DRI driver: i965 [ 35.904] (II) intel(0): [DRI2] VDPAU driver: va_gl [ 35.904] (II) intel(0): direct rendering: DRI2 enabled [ 35.904] (II) intel(0): hardware support for Present enabled [ 35.904] (--) RandR disabled [ 35.910] (II) SELinux: Disabled on system [ 35.961] (II) AIGLX: enabled GLX_MESA_copy_sub_buffer [ 35.962] (II) AIGLX: enabled GLX_ARB_create_context [ 35.962] (II) AIGLX: enabled GLX_ARB_create_context_profile [ 35.962] (II) AIGLX: enabled GLX_EXT_create_context_es{,2}_profile [ 35.962] (II) AIGLX: enabled GLX_INTEL_swap_event [ 35.962] (II) AIGLX: enabled GLX_SGI_swap_control [ 35.962] (II) AIGLX: enabled GLX_EXT_framebuffer_sRGB [ 35.962] (II) AIGLX: enabled GLX_ARB_fbconfig_float [ 35.962] (II) AIGLX: enabled GLX_EXT_fbconfig_packed_float [ 35.962] (II) AIGLX: GLX_EXT_texture_from_pixmap backed by buffer objects [ 35.962] (EE) [ 35.962] (EE) Backtrace: [ 35.962] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4d) [0x55cfd26d991d] [ 35.962] (EE) 1: /usr/lib/xorg/Xorg (0x55cfd2521000+0x1bc6b9) [0x55cfd26dd6b9] [ 35.962] (EE) 2: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fa343473000+0x12890) [0x7fa343485890] [ 35.962] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (gsignal+0xc7) [0x7fa3430c0e97] [ 35.962] (EE) 4: /lib/x86_64-linux-gnu/libc.so.6 (abort+0x141) [0x7fa3430c2801] [ 35.963] (EE) 5: /lib/x86_64-linux-gnu/libc.so.6 (0x7fa343082000+0x3039a) [0x7fa3430b239a] [ 35.963] (EE) 6: /lib/x86_64-linux-gnu/libc.so.6 (0x7fa343082000+0x30412) [0x7fa3430b2412] [ 35.963] (EE) 7: /usr/lib/xorg/Xorg (0x55cfd2521000+0x3ec17) [0x55cfd255fc17] [ 35.963] (EE) 8: /usr/lib/xorg/Xorg (0x55cfd2521000+0xe26df) [0x55cfd26036df] [ 35.963] (EE) 9: /usr/lib/xorg/modules/extensions/libglx.so (0x7fa341437000+0x288d7) [0x7fa34145f8d7] [ 35.963] (EE) 10: /usr/lib/xorg/modules/extensions/libglx.so (0x7fa341437000+0x2f851) [0x7fa341466851] [ 35.963] (EE) 11: /usr/lib/xorg/modules/extensions/libglx.so (0x7fa341437000+0x27315) [0x7fa34145e315] [ 35.963] (EE) 12: /usr/lib/xorg/Xorg (InitExtensions+0x3d) [0x55cfd25e708d] [ 35.963] (EE) 13: /usr/lib/xorg/Xorg (0x55cfd2521000+0x56d1f) [0x55cfd2577d1f] [ 35.963] (EE) 14: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xe7) [0x7fa3430a3b97] [ 35.963] (EE) 15: /usr/lib/xorg/Xorg (_start+0x2a) [0x55cfd2561bba] [ 35.963] (EE) [ 35.963] (EE) Fatal server error: [ 35.963] (EE) Caught signal 6 (Aborted). Server aborting [ 35.963] (EE) [ 35.963] (EE) Please consult the The X.Org Foundation support at http://wiki.x.org for help. [ 35.963] (EE) Please also check the log file at "/home/christian/.local/share/xorg/Xorg.0.log" for additional information. [ 35.963] (EE) [ 36.019] (EE) Server terminated with error (1). Closing log file. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1754177/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp