corrupted output in mesa-demo/fp-tri using r600g

Submitted by Stefano Teso

Assigned to mes..@..op.org

Link to original bug (#43332)

Description

Hi,

using mesa from git master (commit mesa@76ba431b), the mesa demo fp-tri, when running the scs.txt shader, displays the correct output overlayed by random blue-ish blocks (perhaps alpha channel corruption?).

The bug doesn't affect llvmpipe. Only scs.txt seems to trigger the issue.

This is on evergreen hw:

01:00.0 VGA compatible controller: ATI Technologies Inc Robson CE [AMD Radeon HD 6300 Series]

on an i7 machine with i386 debian unstable.

The bug is also present in the libGL 7.11.2 shipped by debian, so I don't think it's a regression or a bug in my config.

Please let me know if you need more info.

Thanks,

Version: git