[Mesa-dev] [PATCH mesa 4/4] nv30: Disable msaa on nv4x because it causes gpu lockups

[Hans de Goede]

On nv4x with a msaa visual after a while the gpu locks up, attach gdb to
impress shows it is hanging waiting for a fence which never comes.

Killing ooimpress at this point works exactly once, trying to do any
3d operations after killing impress will lockup the entire system.

This needs further investigation, but for now disable msaa because no
msaa is better then crashing the system.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 src/gallium/drivers/nouveau/nv30/nv30_screen.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/nouveau/nv30/nv30_screen.c b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
index 69acc38..57262b8 100644
--- a/src/gallium/drivers/nouveau/nv30/nv30_screen.c
+++ b/src/gallium/drivers/nouveau/nv30/nv30_screen.c
@@ -321,7 +321,8 @@ nv30_screen_is_format_supported(struct pipe_screen *pscreen,
 {
    struct nv30_screen *screen = nv30_screen(pscreen);
 
-   if (screen->eng3d->oclass >= NV40_3D_CLASS) {
+   /* MSAA visuals work somwhat on nv4x, but cause gpu lockups */
+   if (0 && screen->eng3d->oclass >= NV40_3D_CLASS) {
       if (sample_count > 4)
          return false;
    } else {
-- 
2.4.3