Radeon KMS with rs880 (785G IGP)

[gd_19]

Hello. I was wondering whether it is possible to setup kms with rs880. I tried but it tries to load r770 firmware which produces as error (had to check the logs of course). Then i get a black screen. I use 2.6.32-rc5-zen2 "Perennial Quest" kernel sources...

Moreover supposing i could get it to work, would it be possible to use the hardware 3d accel branch of xf86-video-ati or are kms and 3d mutually exclusive on >=r600 hardware?

[bridgman]

Are you sure it's loading 770 firmware and not 780 ? If so that should be an easy bug to fix. Can you pls post dmesg output or whatever you are using to determine the microcode being loaded ?

3D accel code is in mesa master, not xf86-video-ati, and it works with KMS today.

[agd5f]

Hello. I was wondering whether it is possible to setup kms with rs880. I tried but it tries to load r770 firmware which produces as error (had to check the logs of course). Then i get a black screen. I use 2.6.32-rc5-zen2 "Perennial Quest" kernel sources...

It should be loading the rs780 firmware.

Moreover supposing i could get it to work, would it be possible to use the hardware 3d accel branch of xf86-video-ati or are kms and 3d mutually exclusive on >=r600 hardware?

You can use 3D with or without KMS. Also, you need the r600 mesa 3D driver.

[gd_19]

Are you sure it's loading 770 firmware and not 780 ? If so that should be an easy bug to fix. Can you pls post dmesg output or whatever you are using to determine the microcode being loaded ?

3D accel code is in mesa master, not xf86-video-ati, and it works with KMS today.

Oops ur right. It's rs780 microcode that is loaded.
This is the error i get... It appears before loading the firmware and after the initialising kernel modesetting msg:
[drm:igp_read_bios_from_vram] *ERROR* bad rom signature

ill post a more complete log once i setup x11. I can't paste into links...

[agd5f]

[drm:igp_read_bios_from_vram] *ERROR* bad rom signature

That can be ignored.

Alex

[gd_19]

Solved... Now happily posting from within an fbcon enabled links2.2... :-D I also upgraded to 2.6.32-rc6-zen1

I had to configure drm AND the firmware as built-in... No other combination (either or both as modules) would work. Defaulting to KMS, passing the option to grub or loading the module later using modprobe would also always fail.

However X freezes and only displays a corrupted ribbon pattern on the lower 1/3 of the screen... I've compiled most of the xorg-server paraphernalia (including xorg-server itself) from git (although i did try stable packages before that. I've only tested 1.7.1 and git for xorg-server though), and compiled libdrm mesa and xf86-video-ati in that order several times with --enable-radeon-experimental-api for libdrm and --enable-dri and --enable-kms for xf86-video-ati...

KMS rocks tho... this is the fastest console i've ever had

Note: mesa fails unless I compile with MAKEOPTS="-j1" in
Gentoo...

Any ideas?

[Fenix-TX]

I had the same problem with kubuntu karmic and xorg-edgers packages, but if i have to compile all i think that i'll wait until 785G (radeon 9200HD) will be supported.

[agd5f]

However X freezes and only displays a corrupted ribbon pattern on the lower 1/3 of the screen... I've compiled most of the xorg-server paraphernalia (including xorg-server itself) from git (although i did try stable packages before that. I've only tested 1.7.1 and git for xorg-server though), and compiled libdrm mesa and xf86-video-ati in that order several times with --enable-radeon-experimental-api for libdrm and --enable-dri and --enable-kms for xf86-video-ati...

pastebin your dmesg and xorg log. I recently posted a patch on dri-devel that may fix this issue. See comment 25 on this bug 24535:

https://bugs.freedesktop.org/show_bug.cgi?id=24535

Also, you might try a non-zen kernel. I've heard of some people having issues with zen kernels.

[gd_19]

Thanks for the feedback

I have applied the patch but the problem remains... Moreover I tried disabling some of zen's more "exotic" features such as the SLQB allocator and the BFS scheduler to no avail... I'll try vanilla next time...

Anyway here's the logs:

dmesg: http://pastebin.com/m7ae7589
Xorg: http://pastebin.com/m7b6b8f08

Note: When I boot the same kernel with modeset=0 (radeon drm is built in) and start X, I get a black screen with the monitor's backlight on which fades to off in a couple of seconds and I need to hard reset (the same as with modeset=1 without the corruption or the backlight going off)

[agd5f]

Does it work without kms?

Edit: appears not.