Was: More ULE bugs fixed. Is: Mouse problem?

Eirik Oeverby ltning at anduin.net
Tue Nov 4 15:27:16 PST 2003

Just for those interested:
I do *not* get any messages at all from the kernel (or elsewhere) when 
my mouse goes haywire. And it's an absolute truth (just tested back and 
forth 8 times) that it *only* happens with SCHED_ULE and *only* with old 
versions (~1.50) and the very latest ones (1.75 as I'm currently 
running). 1.69 for instance did *not* show any such problems.

I will, however, update my kernel again now, to get the latest 
sched_ule.c (if any changes have been made since 1.75) and to test with 
the new interrupt handler. I have a suspicion it might be a combination 
of SCHED_ULE and some signal/message/interrupt handling causing messages 
to get lost along the way. Because that's exactly how it feels...


Morten Johansen wrote:
> On Tue, 4 Nov 2003, Sheldon Hearn wrote:
>> On (2003/11/04 09:29), Eirik Oeverby wrote:
>> > The problem is two parts: The mouse tends to 'lock up' for brief 
>> moments
>> > when the system is under load, in particular during heavy UI operations
>> > or when doing compile jobs and such.
>> > The second part of the problem is related, and is manifested by the
>> > mouse actually making movements I never asked it to make.
>> Wow, I just assumed it was a local problem.  I'm also seeing unrequested
>> mouse movement, as if the signals from movements are repeated or
>> amplified.
>> The thing is, I'm using 4BSD, not ULE, so I wouldn't trouble Jeff to
>> look for a cause for that specific problem in ULE.
> Me too. Have had this problem since I got a "Intellimouse" PS/2 
> wheel-mouse. (It worked fine with previous mice (no wheel)).
> With any scheduler in 5-CURRENT and even more frequent in 4-STABLE, 
> IIRC. Using moused or not doesn't make a difference.
> Get these messages on console: "psmintr: out of sync", and the mouse 
> freezes then goes wild for a few seconds.
> Can happen under load and sometimes when closing Mozilla (not often).
> It could be related to the psm-driver. Or maybe I have a bad mouse, I 
> don't know.
> I will try another mouse, but it does work perfectly in Linux and 
> Windogs...
> mj
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