[Bug 361766] [NEW] thinkpad r61i hangs on suspend with realtime kernel

[Robert Persson]

Public bug reported:

Binary package hint: linux-image-rt

Yesterday I tried to use the Intrepid realtime kernel, instead of the
generic kernel which I have been using for quite a while without too
many problems, and I found that I could no longer suspend my machine (a
Thinkpad R61i running 64bit Intrepid). When I attempted to do so I would
get a message saying "Freezing of tasks failed after 20.00 seconds (2
tasks refusing to freeze)." I got this precise message two or three
times. The one after that was the same except for "4 tasks...".

Once I get this message the machine is unusable. Even though the disk
activity light flashes intermittently, showing that something is going
on, the interface is completely locked up and I have to force a hard
shutdown by holding down the power button.

The tasks refusing to freeze were, in the first instances,
NetworkManager and wpa_supplicant. In the last instance they were
NetworkManager, wpa_supplicant, gnome-do and avahi-daemon.

I have now gone back to using the generic kernel for the time being and
it continues to be able to put itself to sleep properly as it always
did.

I should probably mention though, even though I am fairly sure they has
no relevance, that every now and then suspend fails using the generic
kernel because of something to do with Skype, but all this means is that
I have to try again a few seconds later; the machine doesn't lock up. I
have also been getting a weird message these last few weeks every time I
wake the machine up, saying that it has been impossible to mount a
particular dvd-rom, despite the fact that it has already been mounted
successfully.

** Affects: linux-meta (Ubuntu)
     Importance: Undecided
         Status: New

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thinkpad r61i hangs on suspend with realtime kernel
https://bugs.launchpad.net/bugs/361766
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