[Bug 543412] [NEW] Input lag in Konsole (karmic)

[Pete Eby]

Public bug reported:

Binary package hint: konsole

Hi everyone,

I'm seeing some extreme input lag in Konsole (4:4.3.2-0ubuntu3) in
Karmic. Other apps are not affected, and input speed is fine in virtual
terminals. This does not happen each time you start Konsole, for example
after a reboot input speed is fine. However, invariably, after the
system is up for a few hours, this input lag shows up. It is not an
insignificant amount of lag, and it essentially renders Konsole unusable
for input and requires a reboot. This started almost immeadiatly upon
this fresh install.

Desktop effects are not enabled. This is running in VIrtualBox ver 3.1.4
(latest)

I have seen similar bugs, such as:
https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/443318

However that bug seems more related to ACPI issues and the acer-wmi
kernel module, which are not applicable in my case. I am seeing nothing
logged in /var/log/messages at all, and no messages from Konsole. It
also never actually crashes, so no crash report is available.

I've also tried starting konsole with:

konsole --notransparency
konsole -graphicssystem raster

I would really appreciate any suggestions as to how to further debug
this issue as rebooting this workstation every time Konsole slows down
is not that great.

Thank you,
Pete

ProblemType: Bug
Architecture: i386
Date: Sun Mar 21 09:15:39 2010
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/kdeinit4
InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
Package: kdelibs-bin 4:4.3.2-0ubuntu7.2
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
SourcePackage: kde4libs
Uname: Linux 2.6.31-20-generic i686
XsessionErrors: (polkit-gnome-authentication-agent-1:1485): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

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


** Tags: apport-bug i386

-- 
Input lag in Konsole (karmic)
https://bugs.launchpad.net/bugs/543412
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