Messages in this thread | | | Subject | RE: Possible CPU_IDLE bug [WAS: Re: Timer unstability on when using C2 and deeper sleep states (Dell Latitude XT)] | From | Milan Plzik <> | Date | Thu, 14 Aug 2008 13:40:14 +0200 |
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On Št, 2008-08-14 at 11:00 +0200, Thomas Gleixner wrote: > On Thu, 14 Aug 2008, Milan Plzik wrote: > > I tried it just now, is performs a bit better than 2.6.26 (e.g. I > > don't get that "press any key unless nothing happens" states), even > > reports a bit more reasonable values of wakeups, but the system > > sometimes becomes rather slow (e.g. when playing video). I was not able > > to compile fglrx driver, so I had to change it to radeon one. And also, > > the number of wakeups reported is not very convincing, though, it > > changes from 300 to 600 (which is ~ two times the sum of wakeups) > > without any reason, and sometimes goes even higher. > > > > I tried to use nolapic_timer option, but it didn't help. > > Can you please try "hpet=disable" on the kernel command line ?
Looks like this has helped; after cold reboot hpet=disable seems to help the system to run properly (on 2.6.26 kernel). I wonder what could cause these problems. In the meanwhile I learned that this machine doesn't do proper cleanup during reboot -- it seems that state before reboot affects the state after reboot, so I should probably do some re-testing with cold reboot after each attempt. I guess I tried hpet=disable some time ago and after quick reboot it did not work properly.
> > Thanks, > tglx
Thank you, Milan
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