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Old 01-21-06, 09:23 AM   #2
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Join Date: Mar 2005
Posts: 84
Default Re: Unmanaged IRQ with 2.6.15 and RT patch

I get similar behavior, although the number of unmanaged interrupts is much lower (<100) with 2.6.15-rt6. This is a UP/P4 HT system with a 6800 card. The disturbing thing is that I also get some random hard-locks with RT and nv8178 (and previous drivers) with no messages in the system logs. I think the problem is some incompatability between the hrtimers subsystem and the video drivers, since the problems seem to disappear with HR_TIMERS off. The problem then becomes intermittent long latencies in interrupt response. You could try disabling hrtimers and see if that helps you.
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