Slow performance with lots of text

Binary package hint: nvidia-current

I work using eclipse (gtk), konsole(qt) and keep firefox (gtk), kmail (qt) apps open in my kubuntu desktop (plasma, no desktop effects).

After a while -- feels like related to the amount of text displayed (opened eclipse tabs, open konsole tabs, the amount of data in konsole and eclipse console), not depending on the amount of time used -- everything slows down considerably.

GTK apps gradually slow down first, followed by sudden slow down of qt apps.

Example of qt slowing down is kmail writing responding to typing with delay of 0.5 ... 2 seconds (per character typed).

Closing all applications and restarting them fixes the slowdown.

The problem began at 10.10, and persists even when using x-swat latest nvidia packages. QT raster rendering does not help the problem.

I guess there's not much that can be done, expect I try to monitor the X resource usage.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-28-generic 2.6.35-28.49
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-28.49-generic 2.6.35.11
Uname: Linux 2.6.35-28-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: AD198x Analog [AD198x Analog]
   Subdevices: 2/2
   Subdevice #0: subdevice #0
   Subdevice #1: subdevice #1
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: joonas 1981 F.... pulseaudio
 /dev/snd/pcmC0D0p: joonas 1981 F...m pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf3020000 irq 49'
   Mixer name : 'Analog Devices AD1884A'
   Components : 'HDA:11d4184a,103c3035,00100200'
   Controls : 34
   Simple ctrls : 20
Date: Thu Mar 24 13:38:49 2011
HibernationDevice: RESUME=UUID=9e760f1f-50fa-4b1d-9944-d33f309be91b
HotplugNewDevices:

HotplugNewMounts:

InstallationMedia: Kubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
IwConfig:
 lo no wireless extensions.

 eth0 no wireless extensions.

 vboxnet0 no wireless extensions.
MachineType: Hewlett-Packard HP Compaq dc7900 Convertible Minitower
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.35-28-generic root=UUID=2c33dea1-ddda-43d8-ab78-70ed99a787d8 ro
ProcEnviron:
 LANGUAGE=
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
RelatedPackageVersions: linux-firmware 1.38.4
RfKill:
 0: hp-wwan: Wireless WAN
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
Symptom: storage
UdevMonitorLog:
 monitor will print the received events for:
 UDEV - the event which udev sends out after rule processing
UdisksMonitorLog: Monitoring activity from the disks daemon. Press Ctrl+C to cancel.
WifiSyslog:
 Mar 24 12:33:40 joonas-desktop-2 kernel: [11350.441388] e1000e: eth0 NIC Link is Down
 Mar 24 12:33:43 joonas-desktop-2 kernel: [11353.521700] e1000e: eth0 NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
dmi.bios.date: 03/05/2009
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 786G1 v01.16
dmi.board.asset.tag: CZC9154D5T
dmi.board.name: 3032h
dmi.board.vendor: Hewlett-Packard
dmi.chassis.asset.tag: CZC9154D5T
dmi.chassis.type: 6
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr786G1v01.16:bd03/05/2009:svnHewlett-Packard:pnHPCompaqdc7900ConvertibleMinitower:pvr:rvnHewlett-Packard:rn3032h:rvr:cvnHewlett-Packard:ct6:cvr:
dmi.product.name: HP Compaq dc7900 Convertible Minitower
dmi.sys.vendor: Hewlett-Packard

Edit: removed some extra tags that did not make sense.