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Re: NetBSD 9.1 amd64, base X11: garbled display



On Sat 10 Apr 2021 at 21:17:31 +0200, Rhialto wrote:
> "i965: Failed to submit batchbuffer: Input/output error",
> and the kernel crashes sometimes a short time later.

/usr/pkg/libexec/xscreensaver/carousel reliably provokes that error
message. The kernel log contains then lots of hexdump, and stuff like

Apr 10 21:33:31 vargaz /netbsd: [ 3749.9252610] 000117cc :  000000c0
Apr 10 21:33:31 vargaz /netbsd: [ 3749.9252610] 000117d0 :  0000b6ff
Apr 10 21:33:31 vargaz /netbsd: [ 3749.9252610] 000117d4 :  01000000
...
Apr 10 21:33:31 vargaz /netbsd: [ 3749.9352668] 00013368 :  02000000
Apr 10 21:33:31 vargaz /netbsd: [ 3749.9352668] 0001336c :  00000000
Apr 10 21:33:31 vargaz /netbsd: [ 3749.9352668] 0001337
Apr 10 21:33:37 vargaz /netbsd: [ 3755.9180155] kern info: [drm] stuck on render ring
Apr 10 21:33:37 vargaz /netbsd: [ 3755.9180155] kern info: [drm] GPU HANG: ecode 4:0:0x86fefffc, reason: Ring hung, action: reset
Apr 10 21:33:37 vargaz /netbsd: [ 3755.9180155] kern error: [drm:(/usr/src/sys/external/bsd/drm2/dist/drm/i915/i915_gem.c:3196)i915_context_is_banned] *ERROR* gpu hanging too fast, banning!
Apr 10 21:33:37 vargaz /netbsd: [ 3755.9180155] kern info: [drm] stuck on render ringng
Apr 10 21:33:37 vargaz /netbsd: [ 3756.1181094] 000117cc :  000000c0
Apr 10 21:33:37 vargaz /netbsd: [ 3756.1181094] 000117d0 :  0000b6ff
Apr 10 21:33:37 vargaz /netbsd: [ 3756.1181094] 000117d4 :  01000000
...

I can switch to the "modesetting" driver, but that is too slow to play
movies, so it's useless.

-Olaf.
-- 
___ Q: "What's an anagram of Banach-Tarski?"  -- Olaf "Rhialto" Seibert
\X/ A: "Banach-Tarski Banach-Tarski."         -- rhialto at falu dot nl

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