Bug 62067

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Description of problem:
After starting X with the accelerated radeon driver, my IBM ThinkPad X22 is
unable to resume from a APM suspend (and is completely hung/frozen)

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1. boot notebook
2. start X (just the X Server itself will do)
3. suspend via (any of) Fn-F4, apm -s, closing cover
4. resume, either by opening cover or hitting 'Fn'
	

Actual Results:  Machine begins to resume (half moon light goes from solid to
blinking) and hangs there for ever.  Must force a power off by holding down
power button.

Expected Results:  The machine should have resumed.

Additional info:

- I'm 99% positive this is a problem with either the radeon drm kernel driver,
or the agpgart kernel driver.  If I use the 'vesa' XFree86 driver, everything is
fine, albeit slowly.
- As long as I don't start X (i.e. stay in console mode) suspend and resume work
fine.  If I start X, exit X, and unload the kernel modules, it will show the
symptoms.
- Machine is brand new.
- Web sites found with google imply that this works for other people with the
same or very similar machines.  (Although not with SkipJack - although other
people are using both 2.4.18 and XFree86 4.2, although not necessarily together.)
- Machine is a P3 - 800Mhz Mobile, Radeon Mobility M6 LY chip, 128 MB Ram. 
Everything else is working fine.
- I've tried disabling apmd, no change.
- I've tried a 2.4.17 kernel, 2.4.18 stock kernel, 2.4.19-pre3-ac6 kernel, and
no change.
- I thought about ACPI, but the Linux userspace support doesn't seem ready yet.
- I'd love to know how to debug this problem.  It's happening at a very
inopportune time.  The only thing I can think of is something with a serial console.