Messages in this thread | | | Date | Fri, 9 Mar 2007 10:00:49 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: [2/6] 2.6.21-rc2: known regressions |
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On Fri, 9 Mar 2007, Ingo Molnar wrote: > > Some day we may have modesetting support in the kernel for some > > graphics hw, right now it's pretty damn spotty. > > having no video is what i'd have expected - but getting a /hang/ is not > what i'd have expected.
I debugged a case exactly like this (with the TRACE_RESUME() thing) back last November on my laptop.
The problem is that radeonfb actually *tries* to re-initialize the graphics chips, but because it doesn't know all the details, it does it wrong, and hangs the whole chip.
I forget exactly where it happened, and it might well be different for you. But this is exactly what TRACE_RESUME can be used to pinpoint if you want to try to debug it.
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