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[Bug 424242] Keyboard does not work on Acer Aspire laptop
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Wed, 7 Jan 2009 01:11:34 -0700 (MST)
  • Message-id: <20090107081134.06B28245390@xxxxxxxxxxxxxxxxxxxxxx>

User jkosina@xxxxxxxxxx added comment

Jiri Kosina <jkosina@xxxxxxxxxx> changed:

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--- Comment #12 from Jiri Kosina <jkosina@xxxxxxxxxx> 2009-01-07 01:11:32 MST
(In reply to comment #11 from Roland Leurs)
problem. I have looked at my dmesg output and I noticed a difference when
working / non working keyboard:

dmesg.kbdnotok.txt:TSC: PIT calibration confirmed by PMTIMER.
dmesg.kbdnotok.txt:TSC: using PMTIMER calibration value
dmesg.kbdnotok.txt:Marking TSC unstable due to TSC halts in idle

dmesg.kbdok.txt:TSC: PIT calibration confirmed by PMTIMER.
dmesg.kbdok.txt:TSC: using PIT calibration value
dmesg.kbdok.txt:Marking TSC unstable due to TSC halts in idle

Every time when the keyboard and touchpad do not work, I have a line

TSC: using PMTIMER calibration value

in my dmesg. When it works it uses PIT for calibration. I reproduced this
several times. It might be a clue....

Roland, thanks a lot for this observation. Seems like your system is having
some serious issue with pmtimer, but I am not able to immediately see what the
possible culprit might be.

Jiri, have you by any chance ever met similar situation before?

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