Comment 21 for bug 124406

I saw this problem too. When the problem was active also processor load was above normal. I also have USB connected keyboard like someone else had. I also have usb dvb-t tuner Artec T14.

For some reason that tuner dongle was stuck and that caused extra traffic on usb bus. And that caused keys to stuck.

After removing and re-inserting Artec keyboard started to work normally.

Here is dmesg from situation:

.. lots of bulk message failed messages..
[ 1208.985627] dvb-usb: bulk message failed: -110 (1/0)
[ 1211.133604] dvb-usb: bulk message failed: -110 (1/0)
[ 1211.233218] usb 4-2: USB disconnect, address 2
[ 1211.233688] dvb-usb: Artec T14 - USB2.0 DVB-T successfully deinitialized and disconnected.
[ 1214.115975] usb 4-2: new high speed USB device using ehci_hcd and address 4
[ 1214.248214] usb 4-2: configuration #1 chosen from 1 choice
[ 1214.248353] dvb-usb: found a 'Artec T14 - USB2.0 DVB-T' in cold state, will try to load a firmware
[ 1214.319022] dvb-usb: downloading firmware from file 'dvb-usb-dibusb-6.0.0.8.fw'
[ 1214.385481] usb 4-2: USB disconnect, address 4
[ 1214.385508] dvb-usb: generic DVB-USB module successfully deinitialized and disconnected.
[ 1216.136202] usb 4-2: new high speed USB device using ehci_hcd and address 5
[ 1216.277266] usb 4-2: configuration #1 chosen from 1 choice
[ 1216.277682] dvb-usb: found a 'Artec T14 - USB2.0 DVB-T' in warm state.
[ 1216.277778] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer.
[ 1216.281920] DVB: registering new adapter (Artec T14 - USB2.0 DVB-T).
[ 1216.283485] DVB: registering frontend 0 (DiBcom 3000MC/P)...
[ 1216.332777] MT2060: successfully identified (IF1 = 1220)
[ 1216.793610] input: IR-receiver inside an USB DVB receiver as /class/input/input8
[ 1216.793646] dvb-usb: schedule remote query interval to 150 msecs.
[ 1216.793651] dvb-usb: Artec T14 - USB2.0 DVB-T successfully initialized and connected.

kernel:
2.6.22-12-generic #1 SMP Sun Sep 23 18:11:30 GMT 2007 i686 GNU/Linux
Kubuntu gutsy, no desk top effects.