(gdb) cont Continuing. ^C Program received signal SIGINT, Interrupt. 0x00007fac2a93aac7 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6 gdb) bt f #0 0x00007fac2a93aac7 in ioctl () from /lib/x86_64-linux-gnu/libc.so.6 No symbol table info available. #1 0x00007fac28cb0d08 in drmIoctl () from /usr/lib/x86_64-linux-gnu/libdrm.so.2 No symbol table info available. #2 0x00007fac28566501 in ?? () from /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 No symbol table info available. #3 0x00007fac28566688 in ?? () from /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 No symbol table info available. #4 0x00007fac2878f770 in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so No symbol table info available. #5 0x00007fac287a5980 in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so No symbol table info available. #6 0x00007fac2878ede9 in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so No symbol table info available. #7 0x00007fac2887549c in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so No symbol table info available. #8 0x00007fac2c946a79 in damageComposite (op=3 '\003', pSrc=0x7fac2d4737f0, pMask=0x7fac2d3e0040, pDst=0x7fac2d3cf120, xSrc=0, ySrc=0, xMask=0, yMask=0, xDst=281, yDst=541, width=4, height=1) at ../../../miext/damage/damage.c:562 pScreen = ps = 0x7fac2cfd2b50 pScrPriv = 0x7fac2cfd30f0 #9 0x00007fac28876927 in ?? () from /usr/lib/xorg/modules/drivers/intel_drv.so No symbol table info available. #10 0x00007fac2c9405ab in ProcRenderTrapezoids (client=0x7fac2d3ce850) at ../../render/render.c:758 rc = ntraps = pSrc = 0x7fac2d4737f0 pDst = 0x7fac2d3cf120 pFormat = 0x7fac2cfd23a8 stuff = 0x7fac2d4e0348 #11 0x00007fac2c888e61 in Dispatch () at ../../dix/dispatch.c:428 clientReady = 0x7fac2d219460 result = client = 0x7fac2d3ce850 nready = 0 icheck = 0x7fac2cc310f0 start_tick = 280 #12 0x00007fac2c877ec5 in main (argc=10, argv=0x7fff5f0c0208, envp=) at ../../dix/main.c:288 i = alwaysCheckForInput = {0, 1} (gdb) -------------- Xorg.0.log from same case [ 439.274] [mi] EQ overflowing. Additional events will be discarded until existing events are processed. [ 439.274] [ 439.274] Backtrace: [ 439.274] 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x7fac2c9b4d06] [ 439.274] 1: /usr/bin/Xorg (mieqEnqueue+0x26b) [0x7fac2c995fab] [ 439.274] 2: /usr/bin/Xorg (0x7fac2c836000+0x668f2) [0x7fac2c89c8f2] [ 439.274] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x534e) [0x7fac26df934e] [ 439.274] 4: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x7164) [0x7fac26dfb164] [ 439.274] 5: /usr/bin/Xorg (0x7fac2c836000+0x8d937) [0x7fac2c8c3937] [ 439.274] 6: /usr/bin/Xorg (0x7fac2c836000+0xb1c08) [0x7fac2c8e7c08] [ 439.274] 7: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fac2bb5e000+0xf030) [0x7fac2bb6d030] [ 439.274] 8: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7fac2a93aac7] [ 439.274] 9: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7fac28cb0d08] [ 439.274] 10: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9501) [0x7fac28566501] [ 439.274] 11: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9688) [0x7fac28566688] [ 439.274] 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x12770) [0x7fac2878f770] [ 439.274] 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x28980) [0x7fac287a5980] [ 439.274] 14: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x11de9) [0x7fac2878ede9] [ 439.274] 15: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf849c) [0x7fac2887549c] [ 439.274] 16: /usr/bin/Xorg (0x7fac2c836000+0x110a79) [0x7fac2c946a79] [ 439.274] 17: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf9927) [0x7fac28876927] [ 439.274] 18: /usr/bin/Xorg (0x7fac2c836000+0x10a5ab) [0x7fac2c9405ab] [ 439.274] 19: /usr/bin/Xorg (0x7fac2c836000+0x52e61) [0x7fac2c888e61] [ 439.274] 20: /usr/bin/Xorg (0x7fac2c836000+0x41ec5) [0x7fac2c877ec5] [ 439.274] 21: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7fac2a885ead] [ 439.274] 22: /usr/bin/Xorg (0x7fac2c836000+0x4219d) [0x7fac2c87819d] [ 439.274] [ 439.274] [mi] These backtraces from mieqEnqueue may point to a culprit higher up the stack. [ 439.274] [mi] mieq is *NOT* the cause. It is a victim. [ 595.045] [mi] EQ overflow continuing. 100 events have been dropped. [ 595.045] [ 595.045] Backtrace: [ 595.045] 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x7fac2c9b4d06] [ 595.045] 1: /usr/bin/Xorg (0x7fac2c836000+0x668f2) [0x7fac2c89c8f2] [ 595.045] 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x534e) [0x7fac26df934e] [ 595.045] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x7164) [0x7fac26dfb164] [ 595.045] 4: /usr/bin/Xorg (0x7fac2c836000+0x8d937) [0x7fac2c8c3937] [ 595.045] 5: /usr/bin/Xorg (0x7fac2c836000+0xb1c08) [0x7fac2c8e7c08] [ 595.045] 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fac2bb5e000+0xf030) [0x7fac2bb6d030] [ 595.045] 7: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7fac2a93aac7] [ 595.045] 8: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7fac28cb0d08] [ 595.045] 9: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9501) [0x7fac28566501] [ 595.045] 10: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9688) [0x7fac28566688] [ 595.045] 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x12770) [0x7fac2878f770] [ 595.045] 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x28980) [0x7fac287a5980] [ 595.045] 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x11de9) [0x7fac2878ede9] [ 595.045] 14: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf849c) [0x7fac2887549c] [ 595.045] 15: /usr/bin/Xorg (0x7fac2c836000+0x110a79) [0x7fac2c946a79] [ 595.045] 16: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf9927) [0x7fac28876927] [ 595.045] 17: /usr/bin/Xorg (0x7fac2c836000+0x10a5ab) [0x7fac2c9405ab] [ 595.046] 18: /usr/bin/Xorg (0x7fac2c836000+0x52e61) [0x7fac2c888e61] [ 595.046] 19: /usr/bin/Xorg (0x7fac2c836000+0x41ec5) [0x7fac2c877ec5] [ 595.046] 20: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7fac2a885ead] [ 595.046] 21: /usr/bin/Xorg (0x7fac2c836000+0x4219d) [0x7fac2c87819d] [ 595.046] [ 595.428] [mi] EQ overflow continuing. 200 events have been dropped. [ 595.428] [ 595.428] Backtrace: [ 595.428] 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x7fac2c9b4d06] [ 595.428] 1: /usr/bin/Xorg (0x7fac2c836000+0x668f2) [0x7fac2c89c8f2] [ 595.428] 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x534e) [0x7fac26df934e] [ 595.428] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x7164) [0x7fac26dfb164] [ 595.428] 4: /usr/bin/Xorg (0x7fac2c836000+0x8d937) [0x7fac2c8c3937] [ 595.428] 5: /usr/bin/Xorg (0x7fac2c836000+0xb1c08) [0x7fac2c8e7c08] [ 595.428] 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fac2bb5e000+0xf030) [0x7fac2bb6d030] [ 595.428] 7: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7fac2a93aac7] [ 595.428] 8: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7fac28cb0d08] [ 595.428] 9: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9501) [0x7fac28566501] [ 595.428] 10: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9688) [0x7fac28566688] [ 595.428] 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x12770) [0x7fac2878f770] [ 595.428] 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x28980) [0x7fac287a5980] [ 595.428] 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x11de9) [0x7fac2878ede9] [ 595.428] 14: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf849c) [0x7fac2887549c] [ 595.428] 15: /usr/bin/Xorg (0x7fac2c836000+0x110a79) [0x7fac2c946a79] [ 595.428] 16: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf9927) [0x7fac28876927] [ 595.428] 17: /usr/bin/Xorg (0x7fac2c836000+0x10a5ab) [0x7fac2c9405ab] [ 595.428] 18: /usr/bin/Xorg (0x7fac2c836000+0x52e61) [0x7fac2c888e61] [ 595.428] 19: /usr/bin/Xorg (0x7fac2c836000+0x41ec5) [0x7fac2c877ec5] [ 595.428] 20: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7fac2a885ead] [ 595.428] 21: /usr/bin/Xorg (0x7fac2c836000+0x4219d) [0x7fac2c87819d] [ 595.428] [ 595.731] [mi] EQ overflow continuing. 300 events have been dropped. [ 595.731] [ 595.731] Backtrace: [ 595.731] 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x7fac2c9b4d06] [ 595.731] 1: /usr/bin/Xorg (0x7fac2c836000+0x668f2) [0x7fac2c89c8f2] [ 595.731] 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x534e) [0x7fac26df934e] [ 595.731] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x7164) [0x7fac26dfb164] [ 595.731] 4: /usr/bin/Xorg (0x7fac2c836000+0x8d937) [0x7fac2c8c3937] [ 595.731] 5: /usr/bin/Xorg (0x7fac2c836000+0xb1c08) [0x7fac2c8e7c08] [ 595.731] 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fac2bb5e000+0xf030) [0x7fac2bb6d030] [ 595.731] 7: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7fac2a93aac7] [ 595.731] 8: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7fac28cb0d08] [ 595.731] 9: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9501) [0x7fac28566501] [ 595.731] 10: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9688) [0x7fac28566688] [ 595.731] 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x12770) [0x7fac2878f770] [ 595.731] 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x28980) [0x7fac287a5980] [ 595.731] 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x11de9) [0x7fac2878ede9] [ 595.731] 14: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf849c) [0x7fac2887549c] [ 595.731] 15: /usr/bin/Xorg (0x7fac2c836000+0x110a79) [0x7fac2c946a79] [ 595.731] 16: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf9927) [0x7fac28876927] [ 595.731] 17: /usr/bin/Xorg (0x7fac2c836000+0x10a5ab) [0x7fac2c9405ab] [ 595.731] 18: /usr/bin/Xorg (0x7fac2c836000+0x52e61) [0x7fac2c888e61] [ 595.731] 19: /usr/bin/Xorg (0x7fac2c836000+0x41ec5) [0x7fac2c877ec5] [ 595.731] 20: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7fac2a885ead] [ 595.731] 21: /usr/bin/Xorg (0x7fac2c836000+0x4219d) [0x7fac2c87819d] [ 595.731] [ 596.094] [mi] EQ overflow continuing. 400 events have been dropped. [ 596.094] [ 596.094] Backtrace: [ 596.095] 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x7fac2c9b4d06] [ 596.095] 1: /usr/bin/Xorg (0x7fac2c836000+0x668f2) [0x7fac2c89c8f2] [ 596.095] 2: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x534e) [0x7fac26df934e] [ 596.095] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x7164) [0x7fac26dfb164] [ 596.095] 4: /usr/bin/Xorg (0x7fac2c836000+0x8d937) [0x7fac2c8c3937] [ 596.095] 5: /usr/bin/Xorg (0x7fac2c836000+0xb1c08) [0x7fac2c8e7c08] [ 596.095] 6: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fac2bb5e000+0xf030) [0x7fac2bb6d030] [ 596.095] 7: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7fac2a93aac7] [ 596.095] 8: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7fac28cb0d08] [ 596.095] 9: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9501) [0x7fac28566501] [ 596.095] 10: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9688) [0x7fac28566688] [ 596.095] 11: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x12770) [0x7fac2878f770] [ 596.095] 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x28980) [0x7fac287a5980] [ 596.095] 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x11de9) [0x7fac2878ede9] [ 596.095] 14: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf849c) [0x7fac2887549c] [ 596.095] 15: /usr/bin/Xorg (0x7fac2c836000+0x110a79) [0x7fac2c946a79] [ 596.095] 16: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf9927) [0x7fac28876927] [ 596.095] 17: /usr/bin/Xorg (0x7fac2c836000+0x10a5ab) [0x7fac2c9405ab] [ 596.095] 18: /usr/bin/Xorg (0x7fac2c836000+0x52e61) [0x7fac2c888e61] [ 596.095] 19: /usr/bin/Xorg (0x7fac2c836000+0x41ec5) [0x7fac2c877ec5] [ 596.095] 20: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7fac2a885ead] [ 596.095] 21: /usr/bin/Xorg (0x7fac2c836000+0x4219d) [0x7fac2c87819d] [ 596.095] [ 597.173] [mi] EQ overflow continuing. 500 events have been dropped. [ 597.173] [ 597.173] Backtrace: [ 597.173] 0: /usr/bin/Xorg (xorg_backtrace+0x36) [0x7fac2c9b4d06] [ 597.173] 1: /usr/bin/Xorg (0x7fac2c836000+0x668f2) [0x7fac2c89c8f2] [ 597.173] 2: /usr/bin/Xorg (xf86PostMotionEvent+0xd0) [0x7fac2c8d3220] [ 597.173] 3: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x5235) [0x7fac26df9235] [ 597.173] 4: /usr/lib/xorg/modules/input/synaptics_drv.so (0x7fac26df4000+0x7164) [0x7fac26dfb164] [ 597.173] 5: /usr/bin/Xorg (0x7fac2c836000+0x8d937) [0x7fac2c8c3937] [ 597.173] 6: /usr/bin/Xorg (0x7fac2c836000+0xb1c08) [0x7fac2c8e7c08] [ 597.173] 7: /lib/x86_64-linux-gnu/libpthread.so.0 (0x7fac2bb5e000+0xf030) [0x7fac2bb6d030] [ 597.173] 8: /lib/x86_64-linux-gnu/libc.so.6 (ioctl+0x7) [0x7fac2a93aac7] [ 597.173] 9: /usr/lib/x86_64-linux-gnu/libdrm.so.2 (drmIoctl+0x28) [0x7fac28cb0d08] [ 597.173] 10: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9501) [0x7fac28566501] [ 597.173] 11: /usr/lib/x86_64-linux-gnu/libdrm_intel.so.1 (0x7fac2855d000+0x9688) [0x7fac28566688] [ 597.173] 12: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x12770) [0x7fac2878f770] [ 597.173] 13: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x28980) [0x7fac287a5980] [ 597.173] 14: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0x11de9) [0x7fac2878ede9] [ 597.173] 15: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf849c) [0x7fac2887549c] [ 597.173] 16: /usr/bin/Xorg (0x7fac2c836000+0x110a79) [0x7fac2c946a79] [ 597.173] 17: /usr/lib/xorg/modules/drivers/intel_drv.so (0x7fac2877d000+0xf9927) [0x7fac28876927] [ 597.173] 18: /usr/bin/Xorg (0x7fac2c836000+0x10a5ab) [0x7fac2c9405ab] [ 597.173] 19: /usr/bin/Xorg (0x7fac2c836000+0x52e61) [0x7fac2c888e61] [ 597.173] 20: /usr/bin/Xorg (0x7fac2c836000+0x41ec5) [0x7fac2c877ec5] [ 597.173] 21: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xfd) [0x7fac2a885ead] [ 597.173] 22: /usr/bin/Xorg (0x7fac2c836000+0x4219d) [0x7fac2c87819d] [ 597.173]