Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745668] WARNING: at /build/buildd/linux-hammerhead-3.4.0/drivers/video/msm/mdss/mdss_mdp_intf_cmd.c:440 mdss_mdp_cmd_wait4pingpong+0xbc/0x124()
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745676] cmd kickoff timed out (0) ctl=0
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745680] Modules linked in: bcmdhd
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745706] [<c010e518>] (unwind_backtrace+0x0/0x144) from [<c09be1e8>] (dump_stack+0x20/0x24)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745723] [<c09be1e8>] (dump_stack+0x20/0x24) from [<c0193468>] (warn_slowpath_common+0x5c/0x74)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745737] [<c0193468>] (warn_slowpath_common+0x5c/0x74) from [<c019353c>] (warn_slowpath_fmt+0x40/0x48)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745750] [<c019353c>] (warn_slowpath_fmt+0x40/0x48) from [<c0476ce8>] (mdss_mdp_cmd_wait4pingpong+0xbc/0x124)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745764] [<c0476ce8>] (mdss_mdp_cmd_wait4pingpong+0xbc/0x124) from [<c046c08c>] (mdss_mdp_display_commit+0x1a4/0x30c)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745778] [<c046c08c>] (mdss_mdp_display_commit+0x1a4/0x30c) from [<c047b77c>] (mdss_mdp_overlay_kickoff+0x1cc/0x374)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745794] [<c047b77c>] (mdss_mdp_overlay_kickoff+0x1cc/0x374) from [<c049ce6c>] (__mdss_fb_display_thread+0x134/0x324)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745811] [<c049ce6c>] (__mdss_fb_display_thread+0x134/0x324) from [<c01b4c14>] (kthread+0x98/0xa4)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745826] [<c01b4c14>] (kthread+0x98/0xa4) from [<c01080c0>] (kernel_thread_exit+0x0/0x8)
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745834] ---[ end trace b6a721e3440fbca9 ]---
Mar  3 13:34:17 ubuntu-phablet kernel: [   55.745840] __mdss_fb_sync_buf_done_callback: mdp-fence: frame timeout