https://bugs.freedesktop.org/show_bug.cgi?id=78453
--- Comment #6 from Alex Deucher <agd5f at yahoo.com> ---
Try disabling tiling. Add:
Option "ColorTiling" "false"
Option "ColorTiling2D" "false"
to the device section of your xorg.conf, then apply this patch to mesa:
diff --git a/src/gallium/drivers/radeon/r600_texture.c
b/src/gallium/drivers/radeon/r600_texture.c
index e30d933..fe806be 100644
--- a/src/gallium/drivers/radeon/r600_texture.c
+++ b/src/gallium/drivers/radeon/r600_texture.c
@@ -725,6 +725,8 @@ static unsigned r600_choose_tiling(struct
r600_common_screen *rscreen,
{
const struct util_format_description *desc =
util_format_description(templ->format);
+ return RADEON_SURF_MODE_LINEAR_ALIGNED;
+
/* MSAA resources must be 2D tiled. */
if (templ->nr_samples > 1)
return RADEON_SURF_MODE_2D;
And try running gears on a bare xserver.
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