The patch I am mulling is:
diff --git a/src/sna/sna_render.c b/src/sna/sna_render.c
index 697b802..69ac21c 100644
--- a/src/sna/sna_render.c
+++ b/src/sna/sna_render.c
@@ -899,6 +899,9 @@ sna_render_pixmap_partial(struct sna *sna,
DBG(("%s: tile size for tiling %d: %dx%d, size=%d\n",
__FUNCTION__, bo->tiling, tile_width, tile_height, tile_siz
+ if (sna->kgem.gen < 033)
+ tile_width = bo->pitch;
+
/* Ensure we align to an even tile row */
box.y1 = box.y1 & ~(2*tile_height - 1);
box.y2 = ALIGN(box.y2, 2*tile_height);
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: New => Fix Committed
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https://bugs.launchpad.net/bugs/1120108
Title:
[i915gm] GPU lockup IPEHR: 0x7d8e0001
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