[AGP] rv200 and rv250 unusable absent 'agp=off'

[Alex Deucher]

On Sun, Mar 26, 2017 at 5:21 AM, Felix Miata <mrmazda at earthlink.net> wrote:
> AMD Sempron(tm) Processor 3000+
> Fresh installation on resurrected MSI K8MM-V MS-7142 motherboard.
> https://www.msi.com/Motherboard/support/K8MMV.html
> openSUSE Tumbleweed, kernel 4.10.4, server 1.19.3, ati driver 7.9.0
>
> Mouse cursor is about all that can be counted on. Sometimes an app like
> Xterm can be started, but text is smeared if it appears at all. As likely as
> not, the IceWM desktop mostly paints, and nothing more is possible,
> sometimes to the point even remote login cannot force reboot or kill X. The
> following is the tail of dmesg with drm.drm_debug=1 on cmdline (without it,
> no clues show up in dmesg or Xorg.0.log) using RV250/M9 GL [Mobility FireGL
> 9000/Radeon 9000 (similar results if I swap the RV200 for the RV250)(journal
> looks about the same):
>
> [   89.691515] Key type id_legacy registered
> [  319.776019] radeon 0000:01:00.0: ring 0 stalled for more than 10240msec
> [  319.776024] radeon 0000:01:00.0: GPU lockup (current fence id
> 0x0000000000000188 last fence id 0x0000000000000189 on ring 0)
> [  319.942304] radeon: wait for empty RBBM fifo failed ! Bad things might
> happen.
> [  320.104030] Failed to wait GUI idle while programming pipes. Bad things
> might happen.
> [  320.105042] radeon 0000:01:00.0: Saved 31 dwords of commands on ring 0.
> [  320.105051] radeon 0000:01:00.0: (r100_asic_reset:2568)
> RBBM_STATUS=0x8031C100
> [  320.607052] radeon 0000:01:00.0: (r100_asic_reset:2589)
> RBBM_STATUS=0x80010140
> [  321.104586] radeon 0000:01:00.0: (r100_asic_reset:2597)
> RBBM_STATUS=0x00000140
> [  321.104607] radeon 0000:01:00.0: GPU reset succeed
> [  321.104609] radeon 0000:01:00.0: GPU reset succeeded, trying to resume
> [  321.126699] radeon 0000:01:00.0: WB disabled
> [  321.126706] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr
> 0x00000000d0000000 and cpu addr 0xffffbfe840381000
> [  321.126766] [drm] radeon: ring at 0x00000000D0001000
> [  321.126787] [drm] ring test succeeded in 1 usecs
> [  322.208113] [drm:r100_ib_test [radeon]] *ERROR* radeon: fence wait timed
> out.
> [  322.208163] [drm:radeon_ib_ring_tests [radeon]] *ERROR* radeon: failed
> testing IB on GFX ring (-110).
>
> Log:
> http://fm.no-ip.com/Tmp/Linux/Xorg/xorg.0.log-k8mmv-201703260430
>
> Is there something, other than the illogical 'agp=off' cmdline option, that
> can be done to make these cards usable? Time to file a new bug? I don't see
> any that match in a Driver / ATI, Drivers/DRI/r200 search.

You can dry disabling AGP or forcing a specific AGP mode in the
driver.  Append radeon.agpmode=-1 to the kernel command line in grub
to disable it.  Set it to 1, 2, or 4 to force the AGP mode.

Alex

> --
> "The wise are known for their understanding, and pleasant
> words are persuasive." Proverbs 16:21 (New Living Translation)
>
>  Team OS/2 ** Reg. Linux User #211409 ** a11y rocks!
>
> Felix Miata  ***  http://fm.no-ip.com/
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