Comment 29 for bug 157777

Some additional info.
Today it is CPU1 using 100% capacity when locking, CPU2 almost no activity. Till now always 1 Core that is 100% while locked.

Surfing launchpad I found a refference to bug:
https://bugs.launchpad.net/bugs/109643

Difference is that I can work after some time of waiting (when the lockup is over). But I have those messages to:

~$ dmesg | tail
[ 159.756000] Disabling IRQ #7
[ 164.860000] NVRM: Xid (0005:00): 6, PE0000 0f28 ff83b9ec 0000d1f8 00000000 ffc5e0fa
[ 229.120000] NVRM: Xid (0005:00): 26, Ch 000001ff M 00001ffc D ffffffff intr ffffffff
[ 229.120000] NVRM: Xid (0005:00): 1, Ch 000001ff M 00001ffc D ffffffff intr ffffffff
[ 229.120000] NVRM: Xid (0005:00): 7, Ch 000001ff M 00001ffc D ffffffff intr ffffffff
[ 229.128000] NVRM: Xid (0005:00): 6, PE0000 0bd8 00ffffff 0000f85c 00ffffff 00ffffff
[ 895.464000] NVRM: Xid (0005:00): 6, PE0000 0fb0 00ffffff 0000fc50 00ffffff 00ffffff
[ 896.024000] NVRM: Xid (0005:00): 6, PE0000 0fb0 ffffffff 0000fdbc 00ffffff 00ffffff
[ 896.068000] NVRM: Xid (0005:00): 6, PE0000 0fb0 00ffffff 0000ec70 00ffffff 00ffffff
[ 4967.664000] spurious 8259A interrupt: IRQ15.

~$ dpkg -l nvidia-\* | grep ii
ii nvidia-glx-new 100.14.19+2.6.22.4-14.10 NVIDIA binary XFree86 4.x/X.Org 'new' driver
ii nvidia-kernel-common 20051028+1ubuntu7 NVIDIA binary kernel module common files

I don't know if it has anything to do with it but I can't use
sudo cpufreq-set -g ondemand
anymore, not error or something but processorspeed can't be changed after the upgrade, while it worked fine in Feisty.

The same for the nice program:
~$ sudo /usr/sbin/laptop-mode start
sudo: /usr/sbin/laptop-mode: command not found

There was a suggestion to disable powernowd in the URL above. I'll test that tomorrow.