[Expired for xorg-server (Ubuntu) because there has been no activity for
60 days.]
** Changed in: xorg-server (Ubuntu)
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/768567
Title:
x11 keyboard: xkb pointer emulation broken and hard freezing, 100%
reproducible
Status in “xorg-server” package in Ubuntu:
Expired
Bug description:
This worked before absolutely just fine in karmic koala, but now it is
crashing and bringing down the entire operating system. ctrl-alt-f1
and ctrl-alt-bksp are not working, and a hard reboot is required.
___Steps to reproduce___
Add a custom symbol file and load it via xkbcomp.
The file which produces this behavior is attached and in
/usr/share/X11/xkb/symbols/reachable
___Instructions for how to use xkb___
Run [xkbcomp -w 4 schema.txt $DISPLAY], where schema.txt contains the
output of [setxkbmap -print], but with '+reachable' added to the
xkb_symbols clause.
___Symptoms___
Holding down right-alt+i should normally produce the Up Arrow key, but
in this version of the operating system, the system will hard-freeze,
such that no keyboard or mouse input seems to arrive at the screen at
all. This may take a few keystrokes, or holding it down so it
autorepeats, to trigger the freeze. Otherwise the arrow key does not
seem to work (as it had before). This can also be replicated on any
window, but works reliably on chromium while holding down
ctrl+(ralt+[) and holding it down.
Furthermore, if you hit shift-alt-numlk to enable Mouse Keys, you will
be able to emulate the mouse buttons, via ralt+h,n,m. These used to
work just fine in karmic, but now whenever they are pressed, on
keydown (I think), the pointer jumps a large way across the screen.
The amount jumped is roughly described as follows: If the pointer is
on the bottom-right portion of the screen, the pointer jumps a few
hundred pixels to the left and slightly fewer (but still a few hundred
pixels) upwards. If the point is on the bottom-left portion of the
screen, the pointer jumps up and to the left a few hundred pixels, but
a bit less than before, and now more towards the direction of the top-
left corner. If the pointer is in the top-left corner of the screen,
the pointer jumps much less than a hundred pixels, in the direction of
the top left corner. It's as if every time any mouse button is
pressed, the pointer leaps towards the left side of the screen, and
moves slightly towards the top-left corner of the screen, each time
jumping a smaller and smaller amount, such that it never quite reaches
there.
If none of these keys are pressed, the system seems otherwise fairly
stable (I am writing this bug right now with this custom setting, but
if I use any of these particular key combos, my system will hard-
freeze and I will lose my bug report...).
Additionally I mention the following for completeness: This is
probably unrelated to the fact that in karmic, every few hours when
using this setup, all keyboard input will become impossible. The mouse
button will still work, but every time one wishes to type a letter,
one has to press and hold a key; apparently, autorepeat is able to
make the keys work, but the first press does not input anything. Thus
typing 'ctrl-S' would take about 5 seconds, since you had to hold down
ctrl so it would be autorepeating, then hold down S so it would be
autorepeating. This is probably a separate issue from the one I am
reporting now.
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: xserver-common 2:1.7.6-2ubuntu7.5
ProcVersionSignature: Ubuntu 2.6.32-31.61-generic 2.6.32.32+drm33.14
Uname: Linux 2.6.32-31-generic x86_64
NonfreeKernelModules: fglrx
Architecture: amd64
Date: Thu Apr 21 15:24:05 2011
EcryptfsInUse: Yes
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
PackageArchitecture: all
ProcEnviron:
LANGUAGE=
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/zsh
SourcePackage: xorg-server
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