With a tree that is close to 3.15 final I'm regularly seeing the following on my EeePC 900 when starting ioquake3:
[drm:intel_pipe_config_compare] *ERROR* mismatch in gmch_pfit.lvds_border_bits (expected 32768, found 0) ------------[ cut here ]------------ WARNING: CPU: 0 PID: 1594 at drivers/gpu/drm/i915/intel_display.c:9834 check_crtc_state+0x998/0x9ef() pipe state doesn't match! CPU: 0 PID: 1594 Comm: Xorg Not tainted 3.15.0-rc8-00106-ge585b54 #49 Hardware name: ASUSTeK Computer INC. 900/900, BIOS 1006 03/03/2009 b0485438 b011f61f b057c98a ebb03b04 0000063a b057b5f4 0000266a b02c31ef b02c31ef ee42c000 ee488c00 00000000 ee488d74 b011f684 00000009 ebb03aec b057c98a ebb03b04 b02c31ef b057b5f4 0000266a b057c98a 00000000 ebb03bdc Call Trace: [<b0485438>] ? dump_stack+0xa/0x13 [<b011f61f>] ? warn_slowpath_common+0x70/0x85 [<b02c31ef>] ? check_crtc_state+0x998/0x9ef [<b02c31ef>] ? check_crtc_state+0x998/0x9ef [<b011f684>] ? warn_slowpath_fmt+0x33/0x37 [<b02c31ef>] ? check_crtc_state+0x998/0x9ef [<b02cdbe6>] ? intel_modeset_check_state+0x353/0x5fb [<b02cdefd>] ? intel_set_mode+0x2a/0x32 [<b02cebfd>] ? intel_crtc_set_config+0x8c9/0x962 [<b02151e4>] ? idr_alloc+0xb5/0xc3 [<b0292d68>] ? drm_mode_set_config_internal+0x39/0x9b [<b0293325>] ? drm_mode_setcrtc+0x397/0x438 [<b0292f8e>] ? drm_crtc_check_viewport+0xef/0xef [<b028a871>] ? drm_ioctl+0x327/0x38f [<b0292f8e>] ? drm_crtc_check_viewport+0xef/0xef [<b016f5f5>] ? do_sync_read+0x5a/0x7f [<b028a54a>] ? drm_version+0x73/0x73 [<b017a883>] ? do_vfs_ioctl+0x350/0x419 [<b0125e02>] ? recalc_sigpending+0xe/0x36 [<b0126867>] ? __set_task_blocked+0x61/0x67 [<b0127ad6>] ? __set_current_blocked+0xd/0xf [<b0127bf9>] ? sigprocmask+0x77/0x87 [<b017a97d>] ? SyS_ioctl+0x31/0x54 [<b04898c9>] ? sysenter_do_call+0x12/0x26 [<b0480000>] ? klist_release+0x14/0x87 ---[ end trace 900fd39ab2e2b03f ]---