On Tue, Mar 19, 2013 at 08:09:37AM -0700, Rogan Creswick wrote: > My ubuntu-running X201 thinkpad (running the latest Ubuntu), has recently > developed a problem after updating. > > When I wake the machine (by opening the lid) it wakes up just long enough > to show the lock screen, then it goes back to sleep.
I don't know where your particular problem comes from, but on my older T60 thinkpad the suspend/resume problems (and occasional X startup problems) seem related to the incomplete capture and restoration of device state, especially the wifi chip and the ATI graphics chip. Your X201 has integrated Intel graphics. The graphics chip designers at Intel Folsom are less open-source friendly than most other Intel sites. If the Ubuntu resume problem affects all laptops, the graphics won't be the problem, but if it is X201 specific, and also happens with the wifi turned off, that is where I would start looking. One other laptop-specific issue might be how the X201 handles the lid opening. The lid position is sensed with some kind of mechanical switch, and switches bounce and rattle on the microsecond time scale. That may be filtered by firmware, or it may be sent unfiltered to the OS. If the Ubuntu kernel sees something like "open ... no, closed again! ... no, open" it might do what you describe, perhaps suspending with a second suspend event remaining in the event queue. If you configure Ubuntu to suspend and resume only when it sees a function key, not a lid event, you will need extra steps to suspend or resume, but you will have more control and reliability. That is how I configure suspend/resume on my laptops, because T30 and T60 lid events are too flaky. That did not rid me of suspend problems (see graphics musings above) but it reduced them a lot. Keith -- Keith Lofstrom [email protected] Voice (503)-520-1993 _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
