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| Open-Source AMD/ATI Linux Technical support and discussion of the open-source Radeon, RadeonHD, and Avivo drivers. |
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#1
11-03-2009, 02:23 PM
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Radeon KMS with rs880 (785G IGP)
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? 
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#2
11-03-2009, 02:59 PM
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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.
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#3
11-03-2009, 03:48 PM
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Quote:
Quote:
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#4
11-03-2009, 04:12 PM
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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...
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#6
11-04-2009, 05:10 AM
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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? Last edited by gd_19; 11-04-2009 at 05:14 AM.
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#8
11-04-2009, 09:55 AM
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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.
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#9
11-04-2009, 10:49 AM
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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) Last edited by gd_19; 11-04-2009 at 11:09 AM.
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