Messages in this thread | | | Date | Tue, 20 Mar 2007 17:38:26 +0100 | From | Pavel Machek <> | Subject | Re: strange keyboard lag after suspend testing |
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Hi!
> > >> > I was testing suspend in 2.6.21-rc4 a lot, and now... machine feels > > >> > like someone added 50..100msec delay somewhere in keyboard > > >> > handling. Mouse does not seem affected. /proc/interrupts seem to > > >> > increase as they should, for both keyboard and mouse. Can someone > > >> > reproduce it? Any ideas how to debug it? > > >> > > >> Probably just asking the obvious: > > >> it's not a trivial "failed to re-configure repeat rate upon resume" > > >> (which one could rule out by running "kbdrate" again) > > >> but a lag in some interrupt handler or somewhere else deeper, right? > > > > > >No, it is not keyboard rate. Keyboard lags during normal typing, > > >sometimes letters come in groups of two or so... > > > > I might start looking at embedded controller changes and switches. If > > ACPI misbehaves that could starve keyboard controller... But you > > said > > Mouse _seems_ okay, but I'm not sure if I'd notice lag there. > > > that mouse is OK... Hmm, what happens if you load evbug and type while > > watching syslog. Do you observe the same delays? > > Hmm, seems that it only happens in X... so maybe it is some strange > scheduling artefact? > > Hmm, something is wrong here: > > On console, I get expected 4-5 ticks a second. In x in gnome-terminal, > I get this:
It gets weirder: I killed some tasks and now: (on unloaded system running X, notice that top latency was ~1sec at 33:09).
root@amd:~# while true ; do echo -n . ; sleep .2; date; done .Tue Mar 20 17:33:07 CET 2007 .Tue Mar 20 17:33:07 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:08 CET 2007 .Tue Mar 20 17:33:09 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:10 CET 2007 .Tue Mar 20 17:33:11 CET 2007 .Tue Mar 20 17:33:11 CET 2007 .Tue Mar 20 17:33:11 CET 2007 .Tue Mar 20 17:33:12 CET 2007 .Tue Mar 20 17:33:12 CET 2007
As soon as I load the cpu up with while1, machine starts to behave.
When I turn on bluetooth (USB), ACPI can no longer use C3, and machine starts to behave. Hmm? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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