https://bugs.freedesktop.org/show_bug.cgi?id=27571
Summary: Regression: r600 CS checker rejects GL_DEPTH_TEST w/o
depth buffer.
Product: DRI
Version: unspecified
Platform: Other
OS/Version: All
Status: NEW
Severity: major
Priority: medium
Component: DRM/Radeon
AssignedTo: [email protected]
ReportedBy: [email protected]
Created an attachment (id=34858)
--> (https://bugs.freedesktop.org/attachment.cgi?id=34858)
Test case.
The command stream checker recently added to the radeon driver kills
programs which render to a target which does not have a depth buffer
whilst GL_DEPTH_TEST is enabled. Instead of simply not performing
depth buffer operations, the result is program termination and some
rather cryptic error messages:
drmRadeonCmdBuffer: -22. Kernel failed to parse or rejected command
stream. See dmesg for more info.
and in dmesg:
radeon 0000:03:00.0: z/stencil with no depth buffer
radeon 0000:03:00.0: r600_packet3_check:1109 invalid cmd stream 815
[drm:radeon_cs_ioctl] *ERROR* Invalid command stream !
I first noticed this when a program that works using 2.6.33 died
rendering to a FBO, but it is trivially reproducible without using
anything fancy. A test case is attached which works normally with
either Linux 2.6.33, the software rasterizer, or the intel driver.
The failure is reproducible with both mesa 7.8.1 and git master.
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