[Bug 28359] New: Regression running Second Life viewer on r600 (mipmap generation issue?)

[Bug 28359] New: Regression running Second Life viewer on r600 (mipmap generation issue?)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=28359

           Summary: Regression running Second Life viewer on r600 (mipmap
                    generation issue?)
           Product: Mesa
           Version: git
          Platform: x86-64 (AMD64)
        OS/Version: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/R600
        AssignedTo: dri-devel@lists.freedesktop.org
        ReportedBy: makosoft@googlemail.com


There's a regression in recent git master when running the Second Life viewer
on the r600 driver. Objects flash in and out of existence continuously, making
Second Life unusable. git bisect points to the commit
055750fafba58fd2ee0f5611b566a71ab0f22984 "Enable hardware mipmap generation for
radeon" on the 24th of May, which is plausible since Second Life generates all
mipmaps at runtime. 

I'm using a 2600XT card, Linux 2.6.34, latest libdrm master, and the latest
unofficial Imprudence client release (since the official client isn't available
in an x86_64 version).

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[Bug 28359] Regression running Second Life viewer on r600 (mipmap generation issue?)

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https://bugs.freedesktop.org/show_bug.cgi?id=28359

--- Comment #1 from Alex Deucher <agd5f@yahoo.com> 2010-06-02 12:21:35 PDT ---
This is probably a dupe of bug 28284

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[Bug 28359] Regression running Second Life viewer on r600 (mipmap generation issue?)

[bugzilla-daemon]

https://bugs.freedesktop.org/show_bug.cgi?id=28359

--- Comment #2 from Aidan Thornton <makosoft@googlemail.com> 2010-06-03 03:39:12 PDT ---
Well, I can confirm that the patch Will Dyson attached to bug 28284 does *not*
fix this issue for me. Reverting 055750fafba58fd2ee0f5611b566a71ab0f22984, on
the other hand, does seem to. Also, the commit in question smells somewhat
fishy: as far as I can tell, if anything it *disables* hardware mipmap
generation and forces the use of the software path.

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[Bug 28359] Regression running Second Life viewer on r600 (mipmap generation issue?)

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https://bugs.freedesktop.org/show_bug.cgi?id=28359

--- Comment #3 from Aidan Thornton <makosoft@googlemail.com> 2010-06-20 04:50:20 PDT ---
Small additional detail: the mipmaps themselves appear to be generated fine as
far as I can tell, and everything works so long as no mipmap generation is
happening. However, when a mipmap is generated the next frame rendered by the
viewer reliably fails to render a lot of the in-world objects. In fact, whilst
textures are being loaded rapidly enough that at least one mipmap is generated
per frame, the same affected objects are consistently not rendered on every
frame. 

It appears that hardware mipmap generation and rendering are interacting badly
somehow. Given that Second Life relies heavily on streaming textures, this is
enough to make it unusable.

(Oh, and the patch pointed to by git bisect does indeed force hardware mipmap
generation rather than software as it claims).

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[Bug 28359] Regression running Second Life viewer on r600 (mipmap generation issue?)

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https://bugs.freedesktop.org/show_bug.cgi?id=28359

Andreas Boll <andreas.boll.dev@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO

--- Comment #4 from Andreas Boll <andreas.boll.dev@gmail.com> ---
Note: classic r600 driver has been abandoned.
Please use r600g (gallium driver) instead.

Is this still an issue with a newer driver/kernel?

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[Bug 28359] Regression running Second Life viewer on r600 (mipmap generation issue?)

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https://bugs.freedesktop.org/show_bug.cgi?id=28359

--- Comment #5 from Aidan Thornton <makosoft@googlemail.com> ---
Nope, doesn't affect r600g and I don't think it ever actually did (though I
wasn't using it at the time because it had - and still has - other unrelated
rendering issues that're harder to work around). Guess this probably wants
closing?

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[Bug 28359] Regression running Second Life viewer on r600 (mipmap generation issue?)

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=28359

Andreas Boll <andreas.boll.dev@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |RESOLVED
         Resolution|---                         |FIXED

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