ubuntu-x-swat team mailing list archive

[Grazvydas Ignotas <notasas@xxxxxxxxx>]

Public bug reported:

Binary package hint: xorg

When using multiple keyboards simultaneously, high CPU usage can be
observed on the system:

S %CPU %MEM    TIME+  COMMAND                                       
R   94  2.2   7:26.75 Xorg
R   22  2.3   0:12.56 xfwm4
S   10  0.0   0:05.02 dbus-daemon
S   10  0.1   0:04.27 xfconfd
R    6  0.1   0:02.34 xfce4-settings-
R    2  0.1   0:00.02 top

It appears Xorg is sending some kind of events to other system processes like dbus too. This slows down the system considerably.
This can be easily reproduced by connecting second USB keyboard and typing on both simultaneously. Using the keyboards separately doesn't cause this problem.

ProblemType: Bug
Architecture: amd64
Date: Thu Feb 11 00:12:17 2010
DistroRelease: Ubuntu 9.10
MachineType: Gigabyte Technology Co., Ltd. 965G-DS3
NonfreeKernelModules: fglrx
Package: xserver-xorg 1:7.4+3ubuntu10
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-19-generic root=/dev/sdb1 ro
ProcEnviron:
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 LANGUAGE=en_US:en
ProcVersionSignature: Ubuntu 2.6.31-19.56-generic
RelatedPackageVersions:
 xserver-xorg 1:7.4+3ubuntu10
 libgl1-mesa-glx 7.6.0-1ubuntu4
 libdrm2 2.4.14-1ubuntu1
 xserver-xorg-video-intel N/A
 xserver-xorg-video-ati 1:6.12.99+git20090929.7968e1fb-0ubuntu1
SourcePackage: xorg
Uname: Linux 2.6.31-19-generic x86_64
dmi.bios.date: 01/24/2008
dmi.bios.vendor: Award Software International, Inc.
dmi.bios.version: F10E
dmi.board.name: 965G-DS3
dmi.board.vendor: Gigabyte Technology Co., Ltd.
dmi.chassis.type: 3
dmi.chassis.vendor: Gigabyte Technology Co., Ltd.
dmi.modalias: dmi:bvnAwardSoftwareInternational,Inc.:bvrF10E:bd01/24/2008:svnGigabyteTechnologyCo.,Ltd.:pn965G-DS3:pvr:rvnGigabyteTechnologyCo.,Ltd.:rn965G-DS3:rvr:cvnGigabyteTechnologyCo.,Ltd.:ct3:cvr:
dmi.product.name: 965G-DS3
dmi.sys.vendor: Gigabyte Technology Co., Ltd.
system:
 distro:             Ubuntu
 architecture:       x86_64kernel:             2.6.31-19-generic

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
high CPU usage when using multiple keyboards simultaneously
https://bugs.launchpad.net/bugs/520126
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