Here is the calling sequence before it gets to that error. Looks like it
really is not able to allocate any more memory in some cases.
radeon_bo_list_validate():
r = ttm_bo_validate(&bo->tbo, &bo->placement, true, false);
ttm_bo_validate():
ret = ttm_bo_move_buffer(bo, placement, interruptible, no_wait);
ttm_bo_move_buffer():
spin_lock(&bo->lock);
ret = ttm_bo_wait(bo, false, interruptible, no_wait);
spin_unlock(&bo->lock);
ttm_bo_wait():
ret = driver->sync_obj_wait(sync_obj, sync_obj_arg, lazy, interruptible);
@sync_obj_wait: See ttm_fence_api.h not found.
since radeon driver is in use, and these functions are setup by
the driver. sync_obj_wait maps to radeon_sync_obj_wait.
radeon_sync_obj_wait():
return radeon_fence_wait((struct radeon_fence *)sync_obj, interruptible);
radeon_fence_wait(): returns a negative number when a lot of windows are
open.
--
[lucid] desktop runs out of video memory on ATI Radeon Mobility 7500
https://bugs.launchpad.net/bugs/507148
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which is the registrant for xserver-xorg-driver-ati.
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