Debugging hang on resume from STR?

[Jani Monoses]

On 10/11/2010 10:54 PM, Karl Tomlinson wrote:
> Jani Monoses writes:
>
>> In a dual monitor setup on a laptop with the card
>>
>> 01:00.0 VGA compatible controller: ATI Technologies Inc M24 1P
>> [Radeon Mobility X600]
>> ( 01:00.0 0300: 1002:3150 )
>>
>> on resuming from suspend to RAM the machine locks up, no pings, no
>> caps-lock toggling, blank screen.
>
> See
> http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.35.y.git;a=blob;f=Documentation/power/s2ram.txt;h=514b94fc931e09b337fd297401d9f9c1aa391dac;hb=HEAD
> for info on TRACE_RESUME, which
> can be used to determine how far resume process gets.

Thanks. I actually used that to narrow the cause down to the video card, 
but I don't remember seeing detailed line info in that dmesg which would 
point to a location within the radeon driver.

>
> I was hitting a similar issue in
> https://bugzilla.kernel.org/show_bug.cgi?id=17692
> so you may like to try disabling ColorTiling.

I'll try that. For now as I said I have disabled modesetting, with no 
visible side effects.

Jani