I found my mistake, I dumb-thumbed the last bisection. The patch that's implicated now makes much more sense, and it;s even specific to the model listed in the bug.
I'll build again with that reverted and have it for testing Here's the offending patch: >From fa7e0b5ba8551654a6887c5b1678c713c0e9c973 Mon Sep 17 00:00:00 2001 From: Alex Deucher <[email protected]> Date: Mon, 18 Oct 2010 23:54:56 -0400 Subject: [PATCH] drm/radeon/kms: properly compute group_size on 6xx/7xx BugLink: http://bugs.launchpad.net/bugs/690730 commit 881fe6c1d06bf49f4ab7aef212cdaf66bd059614 upstream. Needed for tiled surfaces. Signed-off-by: Alex Deucher <[email protected]> Signed-off-by: Dave Airlie <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> Signed-off-by: Andi Kleen <[email protected]> Signed-off-by: Brad Figg <[email protected]> --- drivers/gpu/drm/radeon/r600.c | 7 +++++-- drivers/gpu/drm/radeon/rv770.c | 9 +++++---- 2 files changed, 10 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c index eddeff3..a40be95 100644 --- a/drivers/gpu/drm/radeon/r600.c +++ b/drivers/gpu/drm/radeon/r600.c @@ -1592,8 +1592,11 @@ void r600_gpu_init(struct radeon_device *rdev) rdev->config.r600.tiling_npipes = rdev->config.r600.max_tile_pipes; rdev->config.r600.tiling_nbanks = 4 << ((ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT); tiling_config |= BANK_TILING((ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT); - tiling_config |= GROUP_SIZE(0); - rdev->config.r600.tiling_group_size = 256; + tiling_config |= GROUP_SIZE((ramcfg & BURSTLENGTH_MASK) >> BURSTLENGTH_SHIFT); + if ((ramcfg & BURSTLENGTH_MASK) >> BURSTLENGTH_SHIFT) + rdev->config.r600.tiling_group_size = 512; + else + rdev->config.r600.tiling_group_size = 256; tmp = (ramcfg & NOOFROWS_MASK) >> NOOFROWS_SHIFT; if (tmp > 3) { tiling_config |= ROW_TILING(3); diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c index 67e8073..082c380 100644 --- a/drivers/gpu/drm/radeon/rv770.c +++ b/drivers/gpu/drm/radeon/rv770.c @@ -627,10 +627,11 @@ static void rv770_gpu_init(struct radeon_device *rdev) else gb_tiling_config |= BANK_TILING((mc_arb_ramcfg & NOOFBANK_MASK) >> NOOFBANK_SHIFT); rdev->config.rv770.tiling_nbanks = 4 << ((gb_tiling_config >> 4) & 0x3); - - gb_tiling_config |= GROUP_SIZE(0); - rdev->config.rv770.tiling_group_size = 256; - + gb_tiling_config |= GROUP_SIZE((mc_arb_ramcfg & BURSTLENGTH_MASK) >> BURSTLENGTH_SHIFT); + if ((mc_arb_ramcfg & BURSTLENGTH_MASK) >> BURSTLENGTH_SHIFT) + rdev->config.rv770.tiling_group_size = 512; + else + rdev->config.rv770.tiling_group_size = 256; if (((mc_arb_ramcfg & NOOFROWS_MASK) >> NOOFROWS_SHIFT) > 3) { gb_tiling_config |= ROW_TILING(3); gb_tiling_config |= SAMPLE_SPLIT(3); -- 1.7.0.4 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/703553 Title: After upgrade to linux-image-2.6.35-25 graphics are broken -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
