Your message dated Thu, 25 Mar 2010 00:23:46 +0100
with message-id <201003250023.46971.ewoer...@kde.org>
and subject line Re: Just pressing and holding "a" in konsole recently makes X
eat all cpu
has caused the Debian Bug report #492491,
regarding Just pressing and holding "a" in konsole recently makes X eat all cpu
to be marked as done.
This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.
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--
492491: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=492491
Debian Bug Tracking System
Contact ow...@bugs.debian.org with problems
--- Begin Message ---
Package: konsole
Version: 4:3.5.9.dfsg.1-4
Severity: normal
[I don't know if this is a konsole or X (or qt) bug, but konsole is
where it happens so reporting a bug against konsole, Cc: to
debia...@l.d.o. Feel free to reassign as you see fit.]
Starting with either kernel 2.6.26 or (which I suspect more) a recent
X update in unstable, just pressing and holding a letter makes X eat
lots (>80 %) of cpu (one core of a modern intel core 2 quad) as the
letters get printed. Also when normally typing, there is a noticeable,
but not tremendous, latency before getting the letters on screen. This
didn't happen before.
I don't use any transparency, either at the X level or the konsole
fake transparency. Schema is white on black, font is Monospace bold
12, antialiased. The same does not happen in gnome-terminal with the
same (and still antialiased) font.
Video card is Radeon HD 2600 with xserver-xorg-video-radeonhd 1.2.1-2
and xserver-xorg-core 2:1.4.2-2, with no direct rendering (I guess DR
is not even supported by the driver yet?). As I mentioned, this used
to work fine for a long time at least until a couple of weeks ago.
Some days ago I rebooted to kernel 2.6.26 and probably also an updated
X server and experienced this bug.
To me a particularly interesting fact is that making the konsole
window larger makes X eat more cpu (despite only the same small
portion of the konsole being updated); with a nearly full-screen
konsole (something like 1600x1120) X takes 80% of cpu; with a 800x600
size (and the same font and everything) the load is 50%.
I did some profiling, all the CPU time gets spent in
xserver-xorg-core's libshadow.so, function shadowUpdatePacked:
------------------------------------------------------------
$ opreport --symbols
warning: [vdso] (tgid:5197 range:0x7fff917ff000-0x7fff91800000) could not be
found.
CPU: Core 2, speed 2394 MHz (estimated)
Counted CPU_CLK_UNHALTED events (Clock cycles when not halted) with a unit mask
of 0x00 (Unhalted core cycles) count 100000
samples % image name app name symbol name
2198021 95.0486 libshadow.so libshadow.so
shadowUpdatePacked
8679 0.3753 libkdeinit_konsole.so libkdeinit_konsole.so (no symbols)
3118 0.1348 libc-2.7.so libc-2.7.so
__gconv_transform_utf8_internal
2966 0.1283 oprofiled oprofiled (no symbols)
2900 0.1254 libc-2.7.so libc-2.7.so mbrtowc
------------------------------------------------------------
If you think it might help, I'm willing to spend some time to debug
this further. For example if you think it would be of any use, I could
get a more detailed source level annotation of shadowUpdatePacked, I
just need to recompile xserver-xorg-core for that.
Sami
-- System Information:
Debian Release: lenny/sid
APT prefers unstable
APT policy: (500, 'unstable'), (500, 'testing')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.26 (SMP w/4 CPU cores; PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages konsole depends on:
ii kdelibs4c2a 4:3.5.9.dfsg.1-6 core libraries and binaries for al
ii libc6 2.7-12 GNU C Library: Shared libraries
ii libgcc1 1:4.3.1-7 GCC support library
ii libqt3-mt 3:3.3.8b-5 Qt GUI Library (Threaded runtime v
ii libstdc++6 4.3.1-7 The GNU Standard C++ Library v3
ii libx11-6 2:1.1.4-2 X11 client-side library
ii libxrender1 1:0.9.4-2 X Rendering Extension client libra
konsole recommends no packages.
Versions of packages konsole suggests:
ii khelpcente 4:4.0.0.really.3.5.9.dfsg.1-4 help center for KDE
-- no debconf information
--- End Message ---
--- Begin Message ---
Version: 4:4.2.0-1
The bug you reported has (most likely) been fixed in KDE SC 4.2
--- End Message ---
