with running the latest Head on ubuntu 10.10 x86_64 generic .config etc.. I seem to be seeing some messages in dmesg with errors:

dmesg | grep drm

[ 8.896877] [drm] Initialized drm 1.1.0 20060810 [ 13.721203] [drm] radeon defaulting to kernel modesetting. [ 13.721210] [drm] radeon kernel modesetting enabled. [ 13.724920] [drm] initializing kernel modesetting (RV530 0x1002:0x71C5). [ 13.725118] [drm] register mmio base: 0x50300000 [ 13.725122] [drm] register mmio size: 65536 [ 13.725490] [drm] Generation 2 PCI interface, using max accessible memory [ 13.725662] [drm] radeon: irq initialized. [ 13.727773] [drm] Detected VRAM RAM=128M, BAR=128M [ 13.727779] [drm] RAM width 128bits DDR [ 13.727979] [drm] radeon: 128M of VRAM memory ready [ 13.727984] [drm] radeon: 512M of GTT memory ready. [ 13.728031] [drm] GART: num cpu pages 131072, num gpu pages 131072 [ 13.730215] [drm] radeon: 1 quad pipes, 2 z pipes initialized. [ 13.732011] [drm] PCIE GART of 512M enabled (table at 0x00040000). [ 13.732157] [drm] Loading R500 Microcode [ 13.769032] [drm] radeon: ring at 0x0000000008001000 [ 13.769073] [drm] ring test succeeded in 7 usecs [ 13.769345] [drm] radeon: ib pool ready. [ 13.769686] [drm] ib test succeeded in 0 usecs [ 13.771650] [drm] Radeon Display Connectors [ 13.771655] [drm] Connector 0: [ 13.771659] [drm] LVDS [ 13.771664] [drm] DDC: 0x7e60 0x7e60 0x7e64 0x7e64 0x7e68 0x7e68 0x7e6c 0x7e6c [ 13.771668] [drm] Encoders: [ 13.771671] [drm] LCD1: INTERNAL_LVTM1 [ 13.771675] [drm] Connector 1: [ 13.771678] [drm] S-video [ 13.771681] [drm] Encoders: [ 13.771684] [drm] TV1: INTERNAL_KLDSCP_DAC2 [ 13.771688] [drm] Connector 2: [ 13.771690] [drm] DVI-I [ 13.771694] [drm] HPD1 [ 13.771698] [drm] DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c [ 13.771702] [drm] Encoders: [ 13.771705] [drm] CRT2: INTERNAL_KLDSCP_DAC2 [ 13.771708] [drm] DFP1: INTERNAL_KLDSCP_TMDS1 [ 13.986293] [drm] fb mappable at 0x400C0000 [ 13.986299] [drm] vram apper at 0x40000000 [ 13.986302] [drm] size 5300224 [ 13.986305] [drm] fb depth is 24 [ 13.986308] [drm] pitch is 5888 [ 14.034638] fb0: radeondrmfb frame buffer device [ 14.034642] drm: registered panic notifier [ 14.034658] [drm] Initialized radeon 2.7.0 20080528 for 0000:01:00.0 on minor 0 [ 101.611455] [drm] radeon: 1 quad pipes, 2 z pipes initialized. [ 101.616231] [drm] PCIE GART of 512M enabled (table at 0x00040000). [ 101.616326] [drm] radeon: ring at 0x0000000008001000 [ 101.616364] [drm] ring test succeeded in 8 usecs [ 101.616380] [drm] ib test succeeded in 0 usecs [ 106.740012] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 106.740020] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing E606 (len 86, WS 4, PS 0) @ 0xE639 [ 106.821701] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id [ 197.711547] [drm] radeon: 1 quad pipes, 2 z pipes initialized. [ 197.716411] [drm] PCIE GART of 512M enabled (table at 0x00040000). [ 197.716480] [drm] radeon: ring at 0x0000000008001000 [ 197.716518] [drm] ring test succeeded in 9 usecs [ 197.716534] [drm] ib test succeeded in 0 usecs [ 202.840011] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 202.840019] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing E606 (len 86, WS 4, PS 0) @ 0xE639 [ 202.924248] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id [ 244.991495] [drm] radeon: 1 quad pipes, 2 z pipes initialized. [ 244.996446] [drm] PCIE GART of 512M enabled (table at 0x00040000). [ 244.996516] [drm] radeon: ring at 0x0000000008001000 [ 244.996554] [drm] ring test succeeded in 9 usecs [ 244.996570] [drm] ib test succeeded in 0 usecs [ 250.120011] [drm:atom_op_jump] *ERROR* atombios stuck in loop for more than 5secs aborting [ 250.120019] [drm:atom_execute_table_locked] *ERROR* atombios stuck executing E606 (len 86, WS 4, PS 0) @ 0xE639 [ 250.218238] [drm:drm_mode_getfb] *ERROR* invalid framebuffer id

should I be worried about these error messages with drm?

also prior too the above, I also noticed that on a clean reboot, once gdm started everything went blank then after a few moments everything starts as normal..(cut from dmesg)

[ 27.319156] Bluetooth: RFCOMM ver 1.11 [ 30.010095] EXT4-fs (sda3): re-mounted. Opts: errors=remount-ro,commit=0 [ 46.110136] radeon 0000:01:00.0: GPU lockup CP stall for more than 10000msec [ 46.110144] ------------[ cut here ]------------ [ 46.110182] WARNING: at drivers/gpu/drm/radeon/radeon_fence.c:243 radeon_fence_wait+0x365/0x3d0 [radeon]() [ 46.110187] Hardware name: MacBookPro2,2 [ 46.110192] GPU lockup (waiting for 0x00000005 last fence id 0x80000000) [ 46.110196] Modules linked in: binfmt_misc rfcomm sco bnep l2cap kvm_intel kvm parport_pc ppdev radeon arc4 ath9k mac80211 ath9k_common ath9k_hw ttm drm_kms_helper drm ath btusb cfg80211 firewire_ohci bluetooth lp joydev sky2 hid_apple video firewire_core applesmc parport usbhid output led_class hid appletouch input_polldev crc_itu_t intel_agp i2c_algo_bit intel_gtt isight_firmware [ 46.110260] Pid: 823, comm: Xorg Not tainted 2.6.36+ #1 [ 46.110264] Call Trace: [ 46.110278] [<ffffffff81061e4f>] warn_slowpath_common+0x7f/0xc0 [ 46.110285] [<ffffffff81061f46>] warn_slowpath_fmt+0x46/0x50 [ 46.110315] [<ffffffffa02c6d65>] radeon_fence_wait+0x365/0x3d0 [radeon] [ 46.110324] [<ffffffff81083bd0>] ? autoremove_wake_function+0x0/0x40 [ 46.110354] [<ffffffffa02c7571>] radeon_sync_obj_wait+0x11/0x20 [radeon] [ 46.110377] [<ffffffffa016d253>] ttm_bo_wait+0x103/0x1c0 [ttm] [ 46.110393] [<ffffffffa02de3f6>] radeon_gem_wait_idle_ioctl+0x96/0x110 [radeon] [ 46.110408] [<ffffffffa0139bdb>] drm_ioctl+0x42b/0x4e0 [drm] [ 46.110423] [<ffffffffa02de360>] ? radeon_gem_wait_idle_ioctl+0x0/0x110 [radeon] [ 46.110427] [<ffffffff810162e8>] ? save_i387_xstate+0x1c8/0x230 [ 46.110431] [<ffffffff815f9965>] ? _raw_spin_lock_irq+0x15/0x20 [ 46.110435] [<ffffffff8100b432>] ? do_signal+0x182/0x7d0 [ 46.110440] [<ffffffff81271d71>] ? file_has_perm+0xd1/0xe0 [ 46.110445] [<ffffffff8116be59>] do_vfs_ioctl+0xb9/0x690 [ 46.110448] [<ffffffff8116c4b1>] sys_ioctl+0x81/0xa0 [ 46.110451] [<ffffffff8100c365>] ? int_check_syscall_exit_work+0x34/0x3d [ 46.110454] [<ffffffff8100c0b2>] system_call_fastpath+0x16/0x1b [ 46.110457] ---[ end trace 693ca408b0e7ec7a ]--- [ 46.265234] radeon: wait for empty RBBM fifo failed ! Bad things might happen. [ 46.420735] Failed to wait GUI idle while programming pipes. Bad things might happen. [ 46.421820] radeon 0000:01:00.0: (rs600_asic_reset:303) RBBM_STATUS=0xF0116100 [ 46.923913] radeon 0000:01:00.0: (rs600_asic_reset:322) RBBM_STATUS=0x90010140 [ 47.424978] radeon 0000:01:00.0: (rs600_asic_reset:330) RBBM_STATUS=0x10000140 [ 47.925583] radeon 0000:01:00.0: (rs600_asic_reset:338) RBBM_STATUS=0x10000140 [ 47.925607] radeon 0000:01:00.0: restoring config space at offset 0x1 (was 0x100403, writing 0x100407) [ 47.926628] radeon 0000:01:00.0: GPU reset succeed [ 47.926630] radeon 0000:01:00.0: GPU reset succeed [ 47.926635] radeon 0000:01:00.0: ffff880031568a00 unpin not necessary [ 48.011499] [drm] radeon: 1 quad pipes, 2 z pipes initialized. [ 48.012366] [drm] PCIE GART of 512M enabled (table at 0x00040000). [ 48.012371] radeon 0000:01:00.0: WB enabled [ 48.012409] [drm] radeon: ring at 0x0000000008001000 [ 48.012444] [drm] ring test succeeded in 10 usecs [ 48.012453] [drm] ib test succeeded in 1 usecs [ 50.209828] EXT4-fs (sda3): re-mounted. Opts: errors=remount-ro,commit=0 [ 63.994688] wlan0: authenticate with 00:1e:2a:00:67:f0 (try 1) [ 64.002020] wlan0: authenticated [ 64.002045] wlan0: associate with 00:1e:2a:00:67:f0 (try 1) [ 64.004306] wlan0: RX AssocResp from 00:1e:2a:00:67:f0 (capab=0x431 status=0 aid=2) [ 64.004309] wlan0: associated [ 64.004570] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 74.260051] wlan0: no IPv6 routers present [ 282.260047] CE: hpet increased min_delta_ns to 7500 nsec

keep in mind this was in the middle of the merge window, so this might be fixed...but am unsure.. (only have seen this one once(if I can reproduce this I will bisect)).