Bug 29851

Created attachment 38374 [details]
glxgears with hyperz on rv350, 2.6.36_rc3

Setting Hyper-Z makes any 3D corrupted here as well on RV350, 2.6.36_rc3, x86/32bit.

(In reply to comment #0)
> Created an attachment (id=38235) [details]
> glxgears.jpeg
> 
> Incoretly rendering.
> Kernel: 2.6.36-rc2
> Mesa/libdrm/ddx: git
> xorg: 1.9.0
> 
> ~ $ RADEON_HYPERZ=1 glxgears
> radeon: Successfully grabbed chipset info from kernel!
> radeon: DRM version: 2.6.0 ID: 0x791f GB: 1 Z: 1
> radeon: GART size: 509 MB VRAM size: 128 MB
> radeon: HyperZ: YES
> couldn't open libtxc_dxtn.so, software DXTn compression/decompression
> unavailable
> Mesa: Mesa 7.9-devel DEBUG build Aug 28 2010 10:23:14
> Mesa warning: couldn't open libtxc_dxtn.so, software DXTn
> compression/decompression unavailable
> Running synchronized to the vertical refresh.  The framerate should be
> approximately the same as the monitor refresh rate.
> 293 frames in 5.0 seconds = 58.480 FPS
> 
> P.S. On screenshot is glxgears area, only small part fast blinking gear

Does this make any difference? In mesa/src/gallium/drivers/r300/r300_state.c:770

-            int compress = r300->screen->caps.is_rv350 ? RV350_Z_COMPRESS_88 : R300_Z_COMPRESS_44;
+            int compress = R300_Z_COMPRESS_44;

(In reply to comment #2)
> (In reply to comment #0)
> > Created an attachment (id=38235) [details] [details]
> > glxgears.jpeg
> > 
> > Incoretly rendering.
> > Kernel: 2.6.36-rc2
> > Mesa/libdrm/ddx: git
> > xorg: 1.9.0
> > 
> > ~ $ RADEON_HYPERZ=1 glxgears
> > radeon: Successfully grabbed chipset info from kernel!
> > radeon: DRM version: 2.6.0 ID: 0x791f GB: 1 Z: 1
> > radeon: GART size: 509 MB VRAM size: 128 MB
> > radeon: HyperZ: YES
> > couldn't open libtxc_dxtn.so, software DXTn compression/decompression
> > unavailable
> > Mesa: Mesa 7.9-devel DEBUG build Aug 28 2010 10:23:14
> > Mesa warning: couldn't open libtxc_dxtn.so, software DXTn
> > compression/decompression unavailable
> > Running synchronized to the vertical refresh.  The framerate should be
> > approximately the same as the monitor refresh rate.
> > 293 frames in 5.0 seconds = 58.480 FPS
> > 
> > P.S. On screenshot is glxgears area, only small part fast blinking gear
> 
> Does this make any difference? In
> mesa/src/gallium/drivers/r300/r300_state.c:770
> 
> -            int compress = r300->screen->caps.is_rv350 ? RV350_Z_COMPRESS_88 :
> R300_Z_COMPRESS_44;
> +            int compress = R300_Z_COMPRESS_44;

No, exactly same behavior

Hello,

I also encounter this bug and investigated it. When I launch Neverball, the first frames are displayed ok. Then they slowly begin to disappear, each frame having less content that the previous.

I restarted Neverball and quickly clicked on the Play button, and I played the first level.

It seems that the Z buffer is not cleared between the frames. I can see the level when it comes nearer to me, but when I play it, it disappears. The only thing I can do is to tilt the ground as much as I can, to make it nearer to the camera.

I looked at the code, but didn't find when the Z buffer is cleared.

I use Linux 2.6.36-rc3, Mesa Git (2010-09-27), libdrm 2010-08-24, Xorg Server 1.9, xf86-video-ati 6.13.1, on a RS690 card (ATI Radeon X1270) with 128Mb of sideport memory.

I tried the proposed patch, but it didn't worked.

(In reply to comment #4)
> Hello,
> 
> I also encounter this bug and investigated it. When I launch Neverball, the
> first frames are displayed ok. Then they slowly begin to disappear, each frame
> having less content that the previous.

I can confirm that (it's not perfectly visible on glxgears)

can you please retest with mesa master?

Nothing changed.

Here is video with wrong behaviour http://www.megaupload.com/?d=XTEJV8LY [about 5MB]

Created attachment 42432 [details] [review]
possible fix

Does the attached patch fix anything?

Review of attachment 42432 [details] [review]:

This patch fixes HyperZ corruption in Unigine Sanctuary and Scorched3D for me (RV530) and decreases amount of corruption in Lightsmark. Also no regressions encountered so far with other games tested (HoN, SC2, War3, Osmos).

Created attachment 42464 [details] [review]
possible fix 2

I've made a new patch. Could you give it a try?

same behaviour :-(

There are some new bug fixes in master. Please test.

Now it look little different, not blinking lines, but more quads  (but really small)

Commit d1dbbf7bf41959df489195d11eb50f8222d293d3 disables hyper-z on rs6xx+, it seems the hw can't do it.

Those who reported issues on other GPUs should file separate bugs.