Ubuntu

disabling caps lock crashes system

Asked by Nick Desaulniers

On a new Razer Blade Stealth (Late 2016, Kaby Lake), if I press CAPS LOCK it works and the keyboard light comes on. When I hit it again to toggle it off, the system locks up. I see various glitched out rectangles appear on screen. I sometime (1/6) hear random noise on the speakers. I had installed open source razer drivers when I noticed this, and have since removed them. Currently running 16.10 with a 4.10 kernel. How can I debug what the last crash was? I'm not even sure if this is a crash, or just my laptops keyboard and trackpad becoming unresponsive. I guess I could try connecting a USB mouse and keyboard and see what happens.

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actionparsnip (andrew-woodhead666) said : 		#1

Check in /var/log

You may find Xorg.0.log or Xorg.1.log (check timestamps). Also check messages and messages.1

HTH

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Nick Desaulniers (ndesaulniers) said : 		#2

There's a crash in Xorg, though this maybe a separate issue:

$ cat /var/log/Xorg.0.log.old

[ 1142.055] (EE) Backtrace:
[ 1142.056] (EE) 0: /usr/lib/xorg/Xorg (xorg_backtrace+0x4a) [0x55d0879db9fa]
[ 1142.056] (EE) 1: /usr/lib/xorg/Xorg (0x55d087822000+0x1bdd69) [0x55d0879dfd69]
[ 1142.056] (EE) 2: /lib/x86_64-linux-gnu/libc.so.6 (0x7faaed46d000+0x35860) [0x7faaed4a2860]
[ 1142.056] (EE) 3: /usr/lib/xorg/modules/libfb.so (_fbGetWindowPixmap+0xd) [0x7faae66ffaad]
[ 1142.056] (EE) 4: /usr/lib/xorg/Xorg (0x55d087822000+0x139967) [0x55d08795b967]
[ 1142.056] (EE) 5: /usr/lib/xorg/Xorg (0x55d087822000+0x139a35) [0x55d08795ba35]
[ 1142.056] (EE) 6: /usr/lib/xorg/Xorg (0x55d087822000+0x13a1a2) [0x55d08795c1a2]
[ 1142.056] (EE) 7: /usr/lib/xorg/Xorg (0x55d087822000+0x138d73) [0x55d08795ad73]
[ 1142.057] (EE) 8: /usr/lib/xorg/Xorg (0x55d087822000+0xe5978) [0x55d087907978]
[ 1142.057] (EE) 9: /usr/lib/xorg/Xorg (0x55d087822000+0x137034) [0x55d087959034]
[ 1142.057] (EE) 10: /usr/lib/xorg/Xorg (0x55d087822000+0x57531) [0x55d087879531]
[ 1142.057] (EE) 11: /lib/x86_64-linux-gnu/libc.so.6 (__libc_start_main+0xf1) [0x7faaed48d3f1]
[ 1142.057] (EE) 12: /usr/lib/xorg/Xorg (_start+0x2a) [0x55d08786333a]
[ 1142.057] (EE)
[ 1142.057] (EE) Segmentation fault at address 0x10
[ 1142.057] (EE)
Fatal server error:
[ 1142.057] (EE) Caught signal 11 (Segmentation fault). Server aborting
[ 1142.057] (EE)
[ 1142.057] (EE)
Please consult the The X.Org Foundation support
  at http://wiki.x.org
 for help.
[ 1142.057] (EE) Please also check the log file at "/var/log/Xorg.0.log" for additional information.
[ 1142.057] (EE)

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Nick Desaulniers (ndesaulniers) said : 		#3

The problem is reproducible with an external USB keyboard as well.

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