Bug 89898

Linux mateus-arch 4.0.5-1-ARCH #1 SMP PREEMPT Sat Jun 6 18:37:49 CEST 2015 x86_64 GNU/Linux
xorg-server 1.17.1-6

Same here.
I am also using a laptop and I am triggering the bug by resuming from hibernation.
I noticed that 1 hour thing too.
I usually have my USB mouse plugged in, so the USB peripherals may very well be related to it.

Xorg.0.log form around the time of the segfault:
[ 20602.300] (II) config/udev: removing device  USB OPTICAL MOUSE
[ 20605.532] (**) Option "fd" "33"
[ 20606.536] (II) UnloadModule: "libinput"
[ 20606.536] (II) systemd-logind: releasing fd for 13:71
[ 20607.037] (EE) systemd-logind: failed to release device: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
[ 20608.965] (EE) 
[ 20608.965] (EE) Backtrace:
[ 20609.157] (EE) 0: /usr/lib/xorg-server/Xorg (OsLookupColor+0x139) [0x5966d9]
[ 20609.357] (EE) 1: /usr/lib/libc.so.6 (__restore_rt+0x0) [0x7f0c0a3fe5af]
[ 20609.377] (EE) 2: /usr/lib/libc.so.6 (__strcmp_sse2_unaligned+0x1a) [0x7f0c0a45ae0a]
[ 20609.378] (EE) 3: /usr/lib/xorg-server/Xorg (xf86SIGIOSupported+0xa18) [0x4a2838]
[ 20609.379] (EE) 4: /usr/lib/libdbus-1.so.3 (dbus_connection_dispatch+0x375) [0x7f0c0c08f4a5]
[ 20609.380] (EE) 5: /usr/lib/libdbus-1.so.3 (dbus_connection_dispatch+0x64d) [0x7f0c0c08fd2d]
[ 20609.380] (EE) 6: /usr/lib/xorg-server/Xorg (config_fini+0x4c1) [0x49c5e1]
[ 20609.380] (EE) 7: /usr/lib/xorg-server/Xorg (WakeupHandler+0x6d) [0x43d8dd]
[ 20610.053] (EE) 8: /usr/lib/xorg-server/Xorg (WaitForSomething+0x1e7) [0x58f427]
[ 20610.054] (EE) 9: /usr/lib/xorg-server/Xorg (SendErrorToClient+0x111) [0x438b21]
[ 20610.054] (EE) 10: /usr/lib/xorg-server/Xorg (remove_fs_handlers+0x41b) [0x43ce0b]
[ 20610.056] (EE) 11: /usr/lib/libc.so.6 (__libc_start_main+0xf0) [0x7f0c0a3eb790]
[ 20610.056] (EE) 12: /usr/lib/xorg-server/Xorg (_start+0x29) [0x4271f9]
[ 20611.785] (EE) 13: ? (?+0x29) [0x29]
[ 20611.785] (EE) 
[ 20612.149] (EE) Segmentation fault at address 0x0
[ 20612.149] (EE) 
Fatal server error:
[ 20612.149] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 20612.149] (EE) 
[ 20612.149] (EE) 
Please consult the The X.Org Foundation support 
	 at http://wiki.x.org
 for help. 
[ 20612.149] (EE) Please also check the log file at "/home/mateus/.local/share/xorg/Xorg.0.log" for additional information.
[ 20612.149] (EE) 
[ 20612.441] (II) AIGLX: Suspending AIGLX clients for VT switch
[ 20612.471] (EE) Server terminated with error (1). Closing log file.

I may have a similar crash when using xrandr.

X.Org X Server 1.17.2
Release Date: 2015-06-16
[ 14947.723] X Protocol Version 11, Revision 0
[ 14947.725] Build Operating System: Linux 4.0.4-2-ARCH x86_64 
[ 14947.726] Current Operating System: Linux rakanishu 4.0.7-2-ARCH #1 SMP PREEMPT Tue Jun 30 07:50:21 UTC 2015 x86_64
[ 14947.726] Kernel command line: root=/dev/sda2 pcie_aspm=force rw initrd=/initramfs-linux.img
[ 14947.728] Build Date: 30 June 2015  09:00:12PM
...
[ 15234.205] (II) modeset(G0): EDID vendor "CMN", prod id 5568
[ 15234.205] (II) modeset(G0): Printing DDC gathered Modelines:
[ 15234.205] (II) modeset(G0): Modeline "1920x1080"x0.0  151.60  1920 2010 2070 2220  1080 1086 1095 1138 -hsync -vsync (68.3 kHz eP)
[ 15235.812] (EE) 
[ 15235.812] (EE) Backtrace:
[ 15235.812] (EE) 0: /usr/lib/xorg-server/Xorg (OsLookupColor+0x139) [0x596779]
[ 15235.813] (EE) 1: /usr/lib/libc.so.6 (__restore_rt+0x0) [0x7f5cf9eb35af]
[ 15235.813] (EE) 2: /usr/lib/xorg-server/Xorg (DamageRegister+0x11) [0x5195f1]
[ 15235.813] (EE) 3: /usr/lib/xorg-server/Xorg (xf86RandR12PreInit+0x488) [0x4bc1f8]
[ 15235.813] (EE) 4: /usr/lib/xorg-server/Xorg (BlockHandler+0x8a) [0x43d88a]
[ 15235.813] (EE) 5: /usr/lib/xorg-server/Xorg (WaitForSomething+0x15b) [0x58f44b]
[ 15235.813] (EE) 6: /usr/lib/xorg-server/Xorg (SendErrorToClient+0x111) [0x438c61]
[ 15235.814] (EE) 7: /usr/lib/xorg-server/Xorg (remove_fs_handlers+0x41b) [0x43cf4b]
[ 15235.814] (EE) 8: /usr/lib/libc.so.6 (__libc_start_main+0xf0) [0x7f5cf9ea0790]
[ 15235.814] (EE) 9: /usr/lib/xorg-server/Xorg (_start+0x29) [0x427319]
[ 15235.814] (EE) 10: ? (?+0x29) [0x29]
[ 15235.814] (EE) 
[ 15235.814] (EE) Segmentation fault at address 0x10
[ 15235.815] (EE) 
Fatal server error:
[ 15235.815] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 15235.815] (EE)

There's at least three other people suddenly getting similar crashes. See (with logs): https://bbs.archlinux.org/viewtopic.php?id=199812

I've tried using various git versions (server, intel driver, kernel, evdev) and reverts – to no avail.

Do your input devices work when you restart the xserver (pkill X; startx)? Mine (all USB) don't.

Since upgrading to kernel 4.1.1 (~3 weeks ago), X hasn't segfaulted. Usb devices are sometimes lost when resuming though.

Bit weird given that I'm getting it both on 4.1.2 and 4.2-git. Then again, I never get it from suspend&resume, either.

xrandr --output HDMI1 --off doesn't cause it either, though it corrupts the display. What should be 1440p+1080p becomes 1080p only, and that monitor's viewport is also screwed up (upper third is doubled horizontally).

Anyway, this is what I get if I call a backtrace from an attached gdb (via ssh):

Program received signal SIGSEGV, Segmentation fault.
0x00000000005f2226 in FlushAllOutput () at io.c:675
675     io.c: File or directory not found
(gdb) bt
#0  0x00000000005f2226 in FlushAllOutput () at io.c:675
#1  0x00000000005e9cbe in WaitForSomething (pClientsReady=pClientsReady@entry=0x321aac0) at WaitFor.c:217
#2  0x000000000043c004 in Dispatch () at dispatch.c:358
#3  0x0000000000441bf4 in dix_main (argc=12, argv=0x7fff953e21b8, envp=<optimized out>) at main.c:298
#4  0x00007f08b32fb790 in __libc_start_main () from /usr/lib/libc.so.6
#5  0x00000000004274b9 in _start ()

I think I'm experiencing the same crash as in Comment 5. It happens seemingly spontaneously/spuriously. It even happened while I was away from the computer. (I returned to find that X had restarted.) This was in the log:

[2272468.016] (EE) Backtrace:
[2272468.016] (EE) 0: /usr/bin/X (xorg_backtrace+0x56) [0x5dc3e6]
[2272468.016] (EE) 1: /usr/bin/X (0x400000+0x1e1729) [0x5e1729]
[2272468.016] (EE) 2: /lib64/libc.so.6 (0x7f73d01c3000+0x33bc0) [0x7f73d01f6bc0]
[2272468.016] (EE) 3: /usr/bin/X (FlushAllOutput+0xc1) [0x5e0d71]
[2272468.016] (EE) 4: /usr/bin/X (0x400000+0x3baaf) [0x43baaf]
[2272468.016] (EE) 5: /usr/bin/X (0x400000+0x40774) [0x440774]
[2272468.016] (EE) 6: /lib64/libc.so.6 (__libc_start_main+0xf0) [0x7f73d01e2fa0]
[2272468.017] (EE) 7: /usr/bin/X (0x400000+0x27d2e) [0x427d2e]

Using addr2line, I resolve these addresses to source lines, as follows:

0: /usr/bin/X (xorg-server-1.17.2/os/backtrace.c:126)
1: /usr/bin/X (xorg-server-1.17.2/os/osinit.c:132)
2: /lib64/libc.so.6 (??)
3: /usr/bin/X (xorg-server-1.17.2/os/io.c:675)
4: /usr/bin/X (xorg-server-1.17.2/dix/dispatch.c:455)
5: /usr/bin/X (xorg-server-1.17.2/dix/main.c:307)
6: /lib64/libc.so.6 (??)
7: /usr/bin/X (??)

I have also seen the crash at io.c:675 but with "WaitForSomething" in the trace, as shown in Comment 5.

No more crashes for me with the patch that's in Arch's xorg-server 1.17.2-4:
"os: make sure the clientsWritable fd_set is initialized before use"

Still crashing on Arch Xorg xorg-server 1.17.2-4

[ 13517.792] (II) AIGLX: Resuming AIGLX clients after VT switch
[ 13517.792] (II) intel(0): switch to mode 1920x1080@60.0 on eDP1 using pipe 0, position (0, 0), rotation normal, reflection none
[ 13517.792] (EE)
[ 13517.792] (EE) Backtrace:
[ 13518.190] (EE) 0: /usr/lib/xorg-server/Xorg (OsLookupColor+0x139) [0x596d09]
[ 13518.221] (EE) 1: /usr/lib/libc.so.6 (__restore_rt+0x0) [0x7f82ae6bf67f]
[ 13518.222] (EE) 2: /usr/lib/libc.so.6 (cfree+0x34) [0x7f82ae707ac4]
[ 13518.222] (EE) 3: /usr/lib/libc.so.6 (realloc+0x25d) [0x7f82ae707d8d]
[ 13518.223] (EE) 4: /usr/lib/xorg-server/Xorg (xf86PruneDuplicateModes+0xdc6) [0x4b9cc6]
[ 13518.223] (EE) 5: /usr/lib/xorg-server/Xorg (xf86PruneDuplicateModes+0x1c2b) [0x4bb91b]
[ 13518.223] (EE) 6: /usr/lib/xorg/modules/extensions/libglx.so (GlxSetVisualConfigs+0x65bf) [0x7f82abeb4eff]
[ 13518.223] (EE) 7: /usr/lib/xorg-server/Xorg (xf86VTEnter+0x88) [0x4784d8]
[ 13518.223] (EE) 8: /usr/lib/xorg-server/Xorg (xf86SIGIOSupported+0x867) [0x4a2747]
[ 13518.223] (EE) 9: /usr/lib/xorg-server/Xorg (xf86SIGIOSupported+0xb6b) [0x4a2afb]
[ 13518.224] (EE) 10: /usr/lib/libdbus-1.so.3 (dbus_connection_dispatch+0x375) [0x7f82b0353165]
[ 13518.225] (EE) 11: /usr/lib/libdbus-1.so.3 (dbus_connection_dispatch+0x6dd) [0x7f82b0353b0d]
[ 13518.225] (EE) 12: /usr/lib/xorg-server/Xorg (config_fini+0x4c1) [0x49c7c1]
[ 13518.225] (EE) 13: /usr/lib/xorg-server/Xorg (WakeupHandler+0x6d) [0x43da1d]
[ 13518.225] (EE) 14: /usr/lib/xorg-server/Xorg (WaitForSomething+0x1ef) [0x58f54f]
[ 13518.225] (EE) 15: /usr/lib/xorg-server/Xorg (SendErrorToClient+0x111) [0x438c61]
[ 13518.225] (EE) 16: /usr/lib/xorg-server/Xorg (remove_fs_handlers+0x41b) [0x43cf4b]
[ 13518.226] (EE) 17: /usr/lib/libc.so.6 (__libc_start_main+0xf0) [0x7f82ae6ac610]
[ 13518.226] (EE) 18: /usr/lib/xorg-server/Xorg (_start+0x29) [0x427319]
[ 13518.226] (EE) 19: ? (?+0x29) [0x29]
[ 13518.226] (EE)
[ 13518.226] (EE) Segmentation fault at address 0x0
[ 13518.226] (EE)
Fatal server error:
[ 13518.226] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 13518.226] (EE)
[ 13518.226] (EE)
Please consult the The X.Org Foundation support
         at http://wiki.x.org
 for help.

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