I've been trying for quite some time to map my audio controls to the corresponding XF86 keys. However,three keys: XF86AudioLowerVolume, XF86AudioRaiseVolume & XF86AudioMute refuse to work properly.
After each login, I can press each of these keys exactly once. Afterwards, their input is repeated until I press another key or send another key signal. xev also shows a repeating keypress from these keys, and showkey shows only a keypress event, but no release. To clarify, this is what the output looks like:
keycode 113 press
keycode 114 press
keycode 115 press
keycode 57 press
keycode 57 release
You can see that the spacebar (keycode 57) shows a release as expected, but keycodes 113-115 don't.
Now I have looked all around on the internet, but I haven't seen another post in which only the key press is registered, and not the key release. I recently upgraded to ubuntu 19.10 and reinstalled xorg but to no avail. Any suggestions?
EDIT:
For all of the three keys, I only get an output in xev the first time I press it; the key is just repeated over and over again, like this:
KeyPress event, serial 34, synthetic NO, window 0x1e00001,
root 0x168, subw 0x0, time 35686, (441,184), root:(1725,204),
state 0x0, keycode 121 (keysym 0x1008ff12, XF86AudioMute), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 34, synthetic NO, window 0x1e00001,
root 0x168, subw 0x0, time 36347, (441,184), root:(1725,204),
state 0x0, keycode 121 (keysym 0x1008ff12, XF86AudioMute), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
........
What surprises me is the line XLookupString gives 0 bytes:, that can't be right? Normal keys a single byte here, which corresponds to the output character. Other XF86 keys give me events like this:
KeymapNotify event, serial 157, synthetic NO, window 0x0,
keys: 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Also, the keycodes that show up in xev to correspond to the correct bindings when I run xmodmap -pke. I am inclined to believe that the problem isn't with my X server, because restarting the X server with sudo systemctl restart display-manager does nothing for me, neither does relogging.
I've also tried restarting the keyboard with
xinput disable 'AT Translated Set 2 keyboard';
xinput enable 'AT Translated Set 2 keyboard'
but to no avail.
I've tried restarting the atkbd module (the keyboard controller) with commands such as modprobe -r atkbd only to receive messages like modprobe: FATAL: Module atkbd is builtin.
So far, the only way to press (and never release) those keys is to restart.
Perhaps it is important to tell that I run a dual booted system with GRUB2. In Windows, the keys work just fine. I guess they also do in the bios, although that's a little hard to test for volume keys.
EDIT 2:
I am using a Medion Erazer P6661 laptop with built-in keyboard.
By listing my keyboard with xinput list-props 12, I get the following information:
Device 'AT Translated Set 2 keyboard':
Device Enabled (167): 1
Coordinate Transformation Matrix (169): 1.000000, 0.000000, 0.000000, 0.000000, 1.000000, 0.000000, 0.000000, 0.000000, 1.000000
libinput Send Events Modes Available (289): 1, 0
libinput Send Events Mode Enabled (290): 0, 0
libinput Send Events Mode Enabled Default (291): 0, 0
Device Node (292): "/dev/input/event4"
Device Product ID (293): 1, 1
