| Summary: | xscreensaver's glknots hangs GPU (945GME/Pineview) | ||
|---|---|---|---|
| Product: | Mesa | Reporter: | Stefan Dirsch <sndirsch> |
| Component: | Drivers/DRI/i915 | Assignee: | Eric Anholt <eric> |
| Status: | RESOLVED DUPLICATE | QA Contact: | |
| Severity: | normal | ||
| Priority: | medium | CC: | eich, mat, oceans112 |
| Version: | unspecified | ||
| Hardware: | Other | ||
| OS: | All | ||
| See Also: | https://bugzilla.novell.com/show_bug.cgi?id=608810 | ||
| Whiteboard: | |||
| i915 platform: | i915 features: | ||
| Attachments: |
intel_reg_dumper output
intel_gpu_dump output |
||
Software stack is:
- libdrm 2.4.17 including
- libdrm-intel-d1308f4+85fb3e5+e6c136c+04f90a4-getXXX-retry.diff
* Fix xserver crashes due to race conditions in getResources & co.
(bnc #590596, 590596, 590596)
- libdrm-intel-fdcde59-Account-for-potential-pinned-buffers-hogging.patch
* Fix potential kernel oopses
- libdrm-commit-4f0f871.diff
* fixes a bug in the intel support which was causing dramatic
failures with at least version 2.10 of the xf86-video-intel
driver (bfo #25475, bfo #25554, bnc #579489)
- xf86-video-intel 2.10.0
- xorg-server 1.6.5
- Mesa 7.7
- Kernel 2.6.32
- DRM kernel drivers (drm/drm_kms_helper/i915) from Kernel 2.6.34rc7
I could try with a newer software stack, but I doubt that this would fix the issue. @Intel: Any chance to attempt to reproduce this on any of your Pineview machine? I mean Pineview is the current Netbook platform from Intel, so that should still be available for Intel engineers ... Created attachment 35879 [details]
intel_reg_dumper output
intel_reg_snapshot freezed the machine completely.
Created attachment 35880 [details]
intel_gpu_dump output
I get different result on my 945GM and Pineview with latest upstream code: it sometimes works ok, and sometimes aborts with error message: glknots: intel_batchbuffer.c:164: _intel_batchbuffer_flush: Assertion `used <= batch->buf->size' failed. Aborted Could be that we disabled assertions in Mesa, but I can't see that at the moment. I might mix this up with a different library or part of X stack. (In reply to comment #5) > I get different result on my 945GM and Pineview with latest upstream code: > > it sometimes works ok, and sometimes aborts with error message: > glknots: intel_batchbuffer.c:164: _intel_batchbuffer_flush: Assertion `used <= > batch->buf->size' failed. > Aborted It looks like you're running a composition manager - we get the same error (appart from being in line 165) when run under mutter. Can you please retry without a composition manager? commit 8accf0a891c85c7d747c5f7f4a4d8a99adb91b2a Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Mon May 31 09:58:25 2010 +0100 intel: Initialize batch->reserved_space on allocation Fixes the assert (and buffer overrun): glknots: intel_batchbuffer.c:164: _intel_batchbuffer_flush: Assertion 'used >= batch->buf->size' failed. Reported in bug: Bug 28274 - xscreensaver's glknots hangs GPU (945GME/Pineview) https://bugs.freedesktop.org/show_bug.cgi?id=28274 I suspect this is the cause of the GPU hang as well. Chris, in which git repo can we find that commit? It isn't really obvious to us. It's in mesa master. Chris, I'm thankful that you dug into this issue :-) Still, this can only be understood as a workaround, in the long term the kernel must be fixed. Though this shouldn't be your concern. A user space program MUST NOT be able to crash hardware, otherwise this is a DoS security issue. The intel drm implementation still seems to lack proper input validation... *** This bug has been marked as a duplicate of bug 26645 *** *** Bug 28195 has been marked as a duplicate of this bug. *** |
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xscreensaver's glknots hangs GPU. This occurs on 945GM (8086:27ae), but also on Pineview (8086:a001). Easy to reproduce (might need two attempts) /usr/lib/xscreensaver/glknots ==> window remains black, only cursor still updates on screen (even after restarting Xserver) ==> requires reboot to fix the issue Xorg.0.log [...] (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error. (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error. (EE) intel(0): Failed to submit batch buffer, expect rendering corruption or even a frozen display: Input/output error. [...] /var/log/messages: [...] [drm:i915_hangcheck_elapsed] *ERROR* Hangcheck timer elapsed... GPU hung render error detected, EIR: 0x00000000 [drm:i915_do_wait_request] *ERROR* i915_do_wait_request returns -5 (awaiting 24709 at 24706) I don't see that issue with any other GL xscreensaver.