| Summary: | [sna] corrupted images (horizontal lines) | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Product: | xorg | Reporter: | Pavel Cahyna <pavel+bzilla> | ||||||||
| Component: | Driver/intel | Assignee: | Chris Wilson <chris> | ||||||||
| Status: | RESOLVED DUPLICATE | QA Contact: | Intel GFX Bugs mailing list <intel-gfx-bugs> | ||||||||
| Severity: | normal | ||||||||||
| Priority: | medium | CC: | ben, joel.bourquard | ||||||||
| Version: | unspecified | Keywords: | regression | ||||||||
| Hardware: | x86-64 (AMD64) | ||||||||||
| OS: | Linux (All) | ||||||||||
| Whiteboard: | |||||||||||
| i915 platform: | i915 features: | ||||||||||
| Attachments: |
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Description
Pavel Cahyna
2016-02-12 10:35:33 UTC
Created attachment 121706 [details]
Screenshot 2
Same here on xf86-video-intel 1:2.99.917+552+ge41040f-1 (Arch Linux). The only machines experiencing corruption show under lspci as "Intel Corporation 4 Series Chipset" as the VGA adapter. It's not all Intel GPU machines as there are other machines with Intel onboard graphics which are fine (either newer or older chipsets). commit 5eb3e5a5e11d14f9deb2a4b83555443b69ab9940 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Sun Jun 28 09:19:26 2015 +0100 drm/i915: Declare the swizzling unknown for L-shaped configurations The old style of memory interleaving swizzled upto the end of the first even bank of memory, and then used the remainder as unswizzled on the unpaired bank - i.e. swizzling is not constant for all memory. This causes problems when we try to migrate memory and so the kernel prevents migration at all when we detect L-shaped inconsistent swizzling. However, this issue also extends to userspace who try to manually detile into memory as the swizzling for an individual page is unknown (it depends on its physical address only known to the kernel), userspace cannot correctly swizzle. Note that this is a new attempt for the previously merged one, reverted in commit d82c0ba6e306f079407f07003e53c262d683397b Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Tue Jul 14 12:29:27 2015 +0200 Revert "drm/i915: Declare the swizzling unknown for L-shaped configurations" This is cc: stable since we need it to fix up troubles with wc cpu mmaps that userspace recently started to use widely. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91105 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@vger.kernel.org [danvet: Add note about previous (failed attempt).] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> *** This bug has been marked as a duplicate of bug 91105 *** Hmm, desktop so you actually want: commit 5eb3e5a5e11d14f9deb2a4b83555443b69ab9940 Author: Chris Wilson <chris@chris-wilson.co.uk> Date: Sun Jun 28 09:19:26 2015 +0100 drm/i915: Declare the swizzling unknown for L-shaped configurations The old style of memory interleaving swizzled upto the end of the first even bank of memory, and then used the remainder as unswizzled on the unpaired bank - i.e. swizzling is not constant for all memory. This causes problems when we try to migrate memory and so the kernel prevents migration at all when we detect L-shaped inconsistent swizzling. However, this issue also extends to userspace who try to manually detile into memory as the swizzling for an individual page is unknown (it depends on its physical address only known to the kernel), userspace cannot correctly swizzle. Note that this is a new attempt for the previously merged one, reverted in commit d82c0ba6e306f079407f07003e53c262d683397b Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Tue Jul 14 12:29:27 2015 +0200 Revert "drm/i915: Declare the swizzling unknown for L-shaped configurations" This is cc: stable since we need it to fix up troubles with wc cpu mmaps that userspace recently started to use widely. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=91105 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Cc: stable@vger.kernel.org [danvet: Add note about previous (failed attempt).] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> (same underlying issue) Chris, Arch's "2.99.917+552+ge41040f-1" version driver uses "git://anongit.freedesktop.org/xorg/driver/xf86-video-intel#commit=e41040f" as the base for the build which is dated 2016-02-16. The commit that you've posted which apparently fixes the issue is dated Jun 28 2015. Wouldn't I already be using your fix if that's the same issue? You appear to have pasted the same thing both times btw. No, it was a kernel bug. You say "was". Do you know if it should still be an issue with Kernel 4.4.1? (which these machines are running). The discussions I'm seeing seem to think it was resolved long ago. Created attachment 124516 [details]
Screenshot of a similar issue on i915
I might have the same issue as you (see my screenshot).
This is on kernel 4.6.2 with i915.
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