Messages in this thread | | | Date | Fri, 9 Mar 2007 12:19:58 +0100 | From | Pavel Machek <> | Subject | Re: [2/6] 2.6.21-rc2: known regressions |
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Hi!
> > disabling the following radeonfb options in the .config made resume work > > again: > > In general, don't even *try* to use radeonfb for suspend/resume. > > I don't think it has ever worked, except on some very rare laptops > (largely PPC Macs) where people had enough information to set up the > PLL's.
It worked ok on thinkpad x32. BIOS did the setup in resume case (with acpi_sleep=..., anyway), and radeonfb could pick the card up from there.
> I don't think the other framebuffer drivers are much better. > > You're better off using the VGA console, and lettign X re-initialize the > graphics device. That generally at least has a reasonably good chance of > working.
suspend.sf.net, s2ram there has a long list of tricks. If you invent new one, please add it there.
> Re-initializing graphics modes really is very hard. You can try with the > BIOS video hack (I forget the kernel command line to turn it on), but we > really do end up depending on X doing it better.
...or you can try vbetool; it is similar hack to acpi_sleep=... , but it works for more people.
> Some day we may have modesetting support in the kernel for some graphics > hw, right now it's pretty damn spotty.
Yep, that's the way to go. Pavel
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