Re: Power Mac G5: Attempting to get 2D acceleration with nouveau and 6800 Ultra

[Logan Anteau <logan.anteau@gmail.com>]

Sorry, forgot to click reply all:

Brock,

It's Jessie 8.2. I looked at yaboot.conf and just changed the vmlinux and initrd.img symlinks to point to my newly installed kernel in /boot. This part is working because upon reboot a uname -r reveals my new kernel is running.

Full dmesg log:

http://pastebin.com/Xnv6Z5ms

Logan

On Wed, Jan 13, 2016 at 10:20 PM, Brock Wittrock <brockwittrock@gmail.com> wrote:

Would you be able to post the full dmesg log? Might help track this one down a bit quicker.  I'm assuming you installed a version of Jessie (8.0 - 8.2)?

You updated your yaboot.conf to boot from the new kernel (or you are specifying it from boot yaboot menu at startup)?

Thanks,

B-rock

On Wed, Jan 13, 2016 at 8:49 PM, Logan Anteau <logan.anteau@gmail.com> wrote:

Hey everyone,

I picked up a dual G5 2.5GHz Power Mac the other day. It has the AGP NVIDIA GeForce 6800 Ultra card installed. I was hoping to get the nouveau driver with 2D acceleration working with it, but I have been struggling.

I stumbled on this article here:

http://powerpcliberation.blogspot.com/2015/07/g5-nouveau-2d-acceleration.html

and recompiled a 3.16.7 kernel from the Debian sources with 4k page sizes instead of the default 64k kernel page size. I also confirmed that the system is not using MSI interrupts.

When I boot, I just get a black screen after the system tries to start lightdm, a dmesg reveals this:

[   28.113131] [drm:drm_edid_block_valid] *ERROR* EDID checksum is invalid, remainder is 163

[   28.113138] Raw EDID:

[   28.113141]   c0 00 00 01 65 d8 ca a0 c0 00 00 01 64 20 60 00

[   28.113143]   c0 00 00 01 65 7a 0e 00 00 00 00 00 00 00 00 00

[   28.113145]   c0 00 00 01 64 20 1d 00 00 00 00 00 00 00 00 01

[   28.113147]   c0 00 00 01 64 17 f0 00 c0 00 00 01 65 d8 ca a0

[   28.113149]   c0 00 00 01 64 20 50 00 c0 00 00 01 65 5f 05 00

[   28.113151]   00 00 00 00 00 00 00 00 c0 00 00 01 64 20 1c e0

[   28.113153]   00 00 00 00 00 00 00 01 c0 00 00 01 65 79 f1 00

[   28.113155]   00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

and some other messages like this:

[  138.991484] nouveau E[Xorg[837]] failed to idle channel 0xcccc0000 [Xorg[837]]

Booting with nouveau.noaccel=1 works, but the software 2D acceleration makes the system unusable. Any suggestions where to go from here? I know getting an ATI card is the easy way out, but I'd like to get this 6800 Ultra I have to work if possible. Thanks for your time!

Logan Anteau