Hi, not sure this is addressed by airlied's last pull request (will test when I have the chance to reboot), but here it goes:

[ 7382.923361] Restarting tasks ... done. [ 7382.943648] BUG: sleeping function called from invalid context at mm/slab.c:3179 [ 7382.951048] in_atomic(): 1, irqs_disabled(): 0, pid: 4632, name: Xorg [ 7382.957483] INFO: lockdep is turned off. [ 7382.961405] Pid: 4632, comm: Xorg Not tainted 3.8.0-rc2+ #24 [ 7382.967059] Call Trace: [ 7382.969512] [<ffffffff81083a4a>] __might_sleep+0xea/0x110 [ 7382.974993] [<ffffffff8115858b>] kmem_cache_alloc_trace+0x15b/0x2d0 [ 7382.981349] [<ffffffffa034edb2>] ttm_bo_move_accel_cleanup+0x1c2/0x310 [ttm] [ 7382.988495] [<ffffffffa05128fc>] radeon_move_blit.isra.7+0xec/0x140 [radeon] [ 7382.995641] [<ffffffffa051319b>] radeon_bo_move+0xab/0x1f0 [radeon] [ 7383.001997] [<ffffffffa034cf6d>] ttm_bo_handle_move_mem+0x26d/0x5c0 [ttm] [ 7383.008866] [<ffffffffa034e177>] ttm_bo_move_buffer+0x127/0x140 [ttm] [ 7383.015393] [<ffffffffa034e22a>] ttm_bo_validate+0x9a/0x120 [ttm] [ 7383.021584] [<ffffffffa0513e30>] radeon_bo_pin_restricted+0x100/0x1b0 [radeon] [ 7383.028897] [<ffffffffa0513eee>] radeon_bo_pin+0xe/0x10 [radeon] [ 7383.031776] usb 10-1.2: new high-speed USB device number 5 using ehci-pci [ 7383.041772] [<ffffffffa05050b3>] avivo_crtc_do_set_base+0xf3/0x520 [radeon] [ 7383.048813] [<ffffffff8126e984>] ? snprintf+0x34/0x40 [ 7383.053959] [<ffffffffa0505b6d>] atombios_crtc_set_base+0x3d/0x60 [radeon] [ 7383.060920] [<ffffffffa036715b>] drm_crtc_helper_set_config+0x77b/0xb30 [drm_kms_helper] [ 7383.069103] [<ffffffffa04269f1>] drm_mode_setcrtc+0x111/0x5c0 [drm] [ 7383.075463] [<ffffffffa04173eb>] drm_ioctl+0x4db/0x5a0 [drm] [ 7383.081220] [<ffffffffa04268e0>] ? drm_mode_setplane+0x370/0x370 [drm] [ 7383.087841] [<ffffffff81185a1d>] ? dput+0x2d/0x1e0 [ 7383.092724] [<ffffffff81180b97>] do_vfs_ioctl+0x97/0x610 [ 7383.098128] [<ffffffff811811a1>] sys_ioctl+0x91/0xb0 [ 7383.103188] [<ffffffff81270d29>] ? lockdep_sys_exit_thunk+0x35/0x67 [ 7383.109543] [<ffffffff814a3329>] system_call_fastpath+0x16/0x1b

and had this happening multiple times since booted. it is triggered by resuming the system from suspend to ram, although it happened during boot time.

04:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI RV770 [Radeon HD 4870]

attached config, lspci -vvv. let me know if more info is needed

-- Aristeu