Why did KMS break suspend to ram?

[DearthnVader]

I've read a few times that Kernel Mod Setting broke suspend to ram on PowerPC, but I'm wondering if anyone can explain why?

Sleep is a big issue for me with all the computers I have, and I don't like to shut them all down when not in use.

Hibernate to disk seem to work on my iBook G4's, but I may as well shut them down for all it takes to get them back up.

Hibernate doesn't work on my late 2005 G5's.

 

[q66_]

It's not something specific to powerpc, suspend-to-ram was broken as hell for x86 too during the early days of kernel modesetting... it just got ironed out over time, but not on some minority hardware like this. I don't think this is a single specific issue, more like a variety of bugs and untested/unfixed paths

Therefore, report stuff to kernel bugzilla if it's broken.

 

[juancarlosonetti]

It's not something specific to powerpc, suspend-to-ram was broken as hell for x86 too during the early days of kernel modesetting... it just got ironed out over time, but not on some minority hardware like this. I don't think this is a single specific issue, more like a variety of bugs and untested/unfixed paths

Therefore, report stuff to kernel bugzilla if it's broken.

Do you think the older Radeon cards will ever have hardware acceleration working again on PPC? Since the UMS-to-KMS transition, it has been utterly broken, with no solution in sight: https://forums.macrumors.com/threads/making-g3s-and-radeon-graphics-great-again.2191877/

 

[q66_]

Do you think the older Radeon cards will ever have hardware acceleration working again on PPC? Since the UMS-to-KMS transition, it has been utterly broken, with no solution in sight: https://forums.macrumors.com/threads/making-g3s-and-radeon-graphics-great-again.2191877/

Well, anything 7000 series and newer should probably work accelerated with mesa, minus suspend. My G4 with Mobility Radeon 9700 works alright, at least, and most of the older stuff is also supported by Mesa.

As for old G3s with Rage 128... you can pretty much forget ever getting 3D accel for that again, but you can get Xorg 2D accel (and maybe even suspend, i dunno, don't have the hardware) - there's the r128 DRM/KMS driver in the kernel, and there's the matching xf86-video-r128. So I guess these should work. That said, a lot of distros don't ship xf86-video-r128 now, I plan to ship it in Void soon.