restore from suspend to ram

[Dan Nicholson]

2010/6/8 Łukasz Maśko <ed at yen.ipipan.waw.pl>:
> Dnia wtorek, 8 czerwca 2010, Nigel Sollars napisał:
>> My old gateway laptop has a Mobility x1400 its running Ubuntu 10.04LTS it
>> does not have this issue but it does do something similar if the lid is
>> closed ( activating the screen disable ) once the screen is out it will
>> not come back on for love nor money.  To be honest though I suspect its
>> more to do with a broken bios / acpi event that causes this.
>>
>> The kernel its using is 2.6.32-2 as per Ubuntu update.
>
> I have the same with my Dell D430, which has a Intel i945GM graphics.
>
> I've also noticed a problem with Suspend-to-RAM, after switching to kernel
> 2.6.34 - after resuming from suspend, my screen starts to flicker randomly,
> not only under X, but also in the console (I'm using KMS). Restarting X
> doesn't work, the only way of getting rid of it is restarting the whole
> system.

On intel you can try installing intel-gpu-tools[1] and then using
intel_reg_dumper before and after suspend to see if some state is not
getting restored correctly. Also, asking on
intel-gfx at lists.freedesktop.org would help.

--
Dan

1. http://cgit.freedesktop.org/xorg/app/intel-gpu-tools/