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Message #42451
[Bug 1236799] Re: Erratic keyboard Ctlr and Alt behavior
13.04 is no longer supported. Is this still a problem on
12.04/14.04/14.10?
** Changed in: unity
Status: New => Incomplete
** Changed in: unity (Ubuntu)
Status: New => Incomplete
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https://bugs.launchpad.net/bugs/1236799
Title:
Erratic keyboard Ctlr and Alt behavior
Status in Unity:
Incomplete
Status in unity package in Ubuntu:
Incomplete
Bug description:
After I upgraded to 13.04 last week, my keyboard started behaving
erratically. I would press "Ctrl+Alt" and the computer would restart
(with a message that "Ctrl+Alt+Del" was pressed). Then I noticed that
the problem is with the left Ctrl key - in the terminal, when I
pressed just the left Ctrl key it would output sometimes e.g. "5~;5~"
other times it would keep printing "-----------" or
"vvvvvvvvvvvvvvvvvv". The output in the terminal without X was
different and also a bit erratic. The same for the left Alt key - in
the terminal it would output e.g. "A;3~A;3~A;3~A;3~A;3~A;3~A;". It
happens randomly - sometimes the Ctrl and Alt keys work as they
should, sometimes not. I haven't noticed any pattern to it.
I doubt it is a hardware problem because before the upgrade I had no
problem with the keyboard whatsoever. But anyway, to be sure I
disconnected and reconnected my laptop's (Thinkpad T420) keyboard. It
made no difference.
$ xprop -root | grep XKB
_XKB_RULES_NAMES_BACKUP(STRING) = "evdev", "pc105", "us", "euro", ""
_XKB_RULES_NAMES(STRING) = "evdev", "pc105", "us,cz,de", "euro,qwerty,", "grp:s
hift_caps_toggle,grp:alt_shift_toggle"
$ gconftool-2 -R /desktop/gnome/peripherals/keyboard/kbd
layouts = [us euro,cz qwerty,de]
options = [grp grp:shift_caps_toggle,grp grp:alt_shift_toggle]
model =
xev output for left Ctrl and left Alt:
KeyPress event, serial 37, synthetic NO, window 0x3800001,
root 0x9b, subw 0x0, time 9639209, (100,-16), root:(102,67),
state 0x10, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 37, synthetic NO, window 0x3800001,
root 0x9b, subw 0x0, time 9639376, (100,-16), root:(102,67),
state 0x14, keycode 37 (keysym 0xffe3, Control_L), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
KeyPress event, serial 37, synthetic NO, window 0x3800001,
root 0x9b, subw 0x0, time 9641112, (100,-16), root:(102,67),
state 0x10, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
XLookupString gives 0 bytes:
XmbLookupString gives 0 bytes:
XFilterEvent returns: False
KeyRelease event, serial 37, synthetic NO, window 0x3800001,
root 0x9b, subw 0x0, time 9641239, (100,-16), root:(102,67),
state 0x18, keycode 64 (keysym 0xffe9, Alt_L), same_screen YES,
XLookupString gives 0 bytes:
XFilterEvent returns: False
ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: unity 7.0.0daily13.06.19~13.04-0ubuntu1
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.4
Architecture: amd64
CompizPlugins: [core,bailer,detection,composite,opengl,decor,compiztoolbox,snap,resize,mousepoll,wall,gnomecompat,vpswitch,grid,regex,imgpng,place,move,animation,expo,session,workarounds,ezoom,staticswitcher,fade,scale,unityshell]
Date: Tue Oct 8 12:03:05 2013
InstallationDate: Installed on 2011-06-06 (854 days ago)
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
MarkForUpload: True
SourcePackage: unity
UpgradeStatus: Upgraded to raring on 2013-10-01 (6 days ago)
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