Doug Maxey wrote:
On Fri, 08 Jul 2005 21:13:26 +0200, Ingo Molnar wrote:
* K.R. Foley <[email protected]> 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.
Sorry. It is PS2.
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
--
kr
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