The card is a Quadro K420, there is no other card in the system:
[ 45.757] (II) NVIDIA(0): NVIDIA GPU Quadro K420 (GK107GL) at PCI:15:0:0 (GPU-0)
[ 45.757] (–) NVIDIA(0): Memory: 1048576 kBytes
[ 45.758] (–) NVIDIA(0): VideoBIOS: 80.07.e3.00.02
A popup appeared in X. I clicked to open a menu at the bottom of the popup and X crashed. The popup in question is the Mozilla Lightning plugin reminders window.
[672150.184] (EE)
[672150.184] (EE) Backtrace:
[672150.221] (EE) 0: /usr/bin/Xorg (xorg_backtrace+0x56) [0x7f855b243d46]
[672150.221] (EE) 1: /usr/bin/Xorg (0x7f855b08d000+0x1baf29) [0x7f855b247f29]
[672150.221] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7f8558d81000+0x35180) [0x7f8558db6180]
[672150.221] (EE) 3: /lib/x86_64-linux-gnu/libc.so.6 (0x7f8558d81000+0x1352e4) [0x7f8558eb62e4]
[672150.221] (EE) 4: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f85532c2000+0xc60c3) [0x7f85533880c3]
[672150.221] (EE) 5: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f85532c2000+0x57f657) [0x7f8553841657]
[672150.221] (EE) 6: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f85532c2000+0x57ffc5) [0x7f8553841fc5]
[672150.221] (EE) 7: /usr/lib/xorg/modules/drivers/nvidia_drv.so (0x7f85532c2000+0x58db98) [0x7f855384fb98]
[672150.221] (EE) 8: /usr/bin/Xorg (0x7f855b08d000+0x14026d) [0x7f855b1cd26d]
[672150.221] (EE) 9: /usr/bin/Xorg (0x7f855b08d000+0xe8735) [0x7f855b175735]
[672150.221] (EE) 10: /usr/bin/Xorg (0x7f855b08d000+0xe9555) [0x7f855b176555]
[672150.221] (EE) 11: /usr/bin/Xorg (0x7f855b08d000+0xe802d) [0x7f855b17502d]
[672150.221] (EE) 12: /usr/bin/Xorg (0x7f855b08d000+0x80e36) [0x7f855b10de36]
[672150.221] (EE) 13: /usr/bin/Xorg (MapWindow+0x117) [0x7f855b110c87]
[672150.221] (EE) 14: /usr/bin/Xorg (0x7f855b08d000+0x51b85) [0x7f855b0deb85]
[672150.221] (EE) 15: /usr/bin/Xorg (0x7f855b08d000+0x573f7) [0x7f855b0e43f7]
[672150.221] (EE) 16: /usr/bin/Xorg (0x7f855b08d000+0x5b596) [0x7f855b0e8596]
[672150.221] (EE) 17: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf5) [0x7f8558da2b45]
[672150.221] (EE) 18: /usr/bin/Xorg (0x7f855b08d000+0x4590e) [0x7f855b0d290e]
[672150.221] (EE)
[672150.221] (EE) Segmentation fault at address 0x7f84369f26a0
[672150.221] (EE)
Fatal server error:
[672150.221] (EE) Caught signal 11 (Segmentation fault). Server aborting
[672150.221] (EE)
[672150.221] (EE)
Please consult the The X.Org Foundation support
at http://wiki.x.org
for help.
[672150.221] (EE) Please also check the log file at “/var/log/Xorg.0.log” for additional information.
[672150.221] (EE)
[672150.675] (EE) Server terminated with error (1). Closing log file.
I sent an email with the nvidia-bug-report output for my system on 17 July, after the previous crashes with Quadro FX 1800.
Since then, I have changed three things in early August:
Driver version upgraded from 340.76 to 352.30
Video card upgraded from Quadro FX 1800 to Quadro K420
Monitor upgraded from 1920 x 1200 to a 4k monitor, 3840 x 2160 resolution
and I haven’t seen it crash again until today.