Messages in this thread | | | Subject | Re: Real-Time Preemption -RT-V0.7.51-17 - Keyboard Problems | Date | Fri, 08 Jul 2005 14:35:28 -0500 | From | Doug Maxey <> |
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On Fri, 08 Jul 2005 21:13:26 +0200, Ingo Molnar wrote: > >* K.R. Foley <kr@cybsft.com> wrote: > >> Ingo, >> >> I have an issue with keys VERY SPORADICALLY repeating, SOMETIMES, when >> running the RT patches. The problem manifests itself as if the key >> were stuck but happens far too quickly for that to be the case. I >> realize that the statements above are far from scientific, but I can't >> seem to narrow it down further. 2.6.12 doesn't seem to have the >> problem at all, only when running the RT patches. It SEEMS to have >> gotten worse lately. I am attaching my config as well as the output >> from lspci. >> >> Adjusting the delay in the keyboard repeat seems to help. Any ideas?
Is the keyboard standard (PS2) or USB? Did not see the detail.
> >hm. Would be nice to somehow find a condition that triggers it. One >possibility is that something else is starving the keyboard handling >path. Right now it's handled via workqueues, which live in keventd. Do >things improve if you chrt keventd up to prio 99? Also i'd chrt the >keyboard IRQ thread up to prio 99 too. > >the other possibility is some IRQ handling bug - those are usually >specific to the IRQ controller, so try turning off (or on) the IO-APIC >[if the box has an IO-APIC], does that change anything?
FWIW, I have seen this issue under USB, off and on since about 2.6.9. Never have dug into it, was always simpler to just unplug and re-plug the keyboard. Of course, this predates RT.
++doug
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