I've recently noticed problems with the kde power management with f13
and as part of debugging this i've come to the conclusion there are
serious (for me) regressions between kernel 2.6.32 and kernel 2.6.33.
I have a fully up to date f13 laptop. If I boot the original f13
kernel (kernel-220.127.116.11-85.fc13.x86_64) I see the following problems:
nouveau driver hangs randomly - very often if i have 3d effects
enabled. it needs a soft or hard power off to fix.
if i use rpmfusion nvidia drivers, normal use is fine, but the system
hangs on exit and needs a soft or hard power off to fix.
After a hard power off the system hangs at "starting udev" on the next
boot, and needs ctrl-alt-del to fix.
with either driver the screen does not lock when the lid is closed
with either driver kde power management does not work
However if I install a recent F12 kernel
(kernel-18.104.22.168-141.fc12.x86_64) then I see
nvidia drivers work as expecte and exit and restart normally
screen is locked when the lid is closed
power management works as expected.
(nouveau is not present in this kernel, I believe)
Obviously running such an old kernel is not a long term solution.
I've already raised a bug about the nouveau hangs, and I intend to
file one regarding these regressions, but before I do so I'd like to
ask if anyone else has seen them or thinks that there may be a
solution I can implement myself.
And in case you're wondering - I will be very happy to move
permanently to the nouveau drivers just as soon as they're stable
enough. I think that day is probably not soon though.
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