<4>[ 187.762312] ------------[ cut here ]------------ <4>[ 187.762443] WARNING: CPU: 0 PID: 43 at /home/cwhuang/git/android-x86-6.0/kernel/drivers/gpu/drm/drm_irq.c:1326 drm_wait_one_vblank+0xf6/0x14b [drm]() <4>[ 187.762447] vblank wait timed out on crtc 0 <4>[ 187.762475] Modules linked in: i915 drm_kms_helper drm fb_sys_fops sysfillrect syscopyarea sysimgblt i2c_algo_bit hid_apple atkbd <4>[ 187.762488] CPU: 0 PID: 43 Comm: kworker/u8:2 Not tainted 4.4.17-android-x86_64 #1 <4>[ 187.762492] Hardware name: LENOVO 20326/Hiking, BIOS 90CN27WW(V1.10) 04/17/2015 <4>[ 187.762511] Workqueue: events_unbound async_run_entry_fn <4>[ 187.762526] 0000000000000286 0000000000000000 ffffffff816111df 0000000000000000 <4>[ 187.762536] ffff88007905f8c8 ffffffffa004525e ffffffff8106890f 0000000000000000 <4>[ 187.762547] ffffffffa002c216 dead000000000200 0000000000000000 ffff88006fdcb800 <4>[ 187.762549] Call Trace: <4>[ 187.762568] [] ? dump_stack+0x47/0x5b <4>[ 187.762582] [] ? warn_slowpath_common+0x9e/0xb7 <4>[ 187.762688] [] ? drm_wait_one_vblank+0xf6/0x14b [drm] <4>[ 187.762699] [] ? warn_slowpath_fmt+0x4a/0x4f <4>[ 187.762807] [] ? drm_wait_one_vblank+0xf6/0x14b [drm] <4>[ 187.762819] [] ? add_wait_queue+0x41/0x41 <4>[ 187.763080] [] ? intel_atomic_commit+0x270/0xdb6 [i915] <4>[ 187.763193] [] ? drm_atomic_check_only+0x445/0x4ca [drm] <4>[ 187.763245] [] ? restore_fbdev_mode+0x112/0x225 [drm_kms_helper] <4>[ 187.763357] [] ? drm_modeset_lock_all_crtcs+0x68/0x87 [drm] <4>[ 187.763405] [] ? drm_fb_helper_restore_fbdev_mode_unlocked+0x32/0x66 [drm_kms_helper] <4>[ 187.763453] [] ? drm_fb_helper_set_par+0x42/0x47 [drm_kms_helper] <4>[ 187.763698] [] ? intel_fbdev_set_par+0x16/0x57 [i915] <4>[ 187.763712] [] ? fbcon_init+0x317/0x41e <4>[ 187.763725] [] ? visual_init+0xec/0x13f <4>[ 187.763737] [] ? do_bind_con_driver+0x1e0/0x2e1 <4>[ 187.763750] [] ? do_take_over_console+0x157/0x168 <4>[ 187.763760] [] ? fbcon_event_notify+0x3c9/0x7a8 <4>[ 187.763771] [] ? do_fbcon_takeover+0x59/0x93 <4>[ 187.763781] [] ? notifier_call_chain+0x33/0x60 <4>[ 187.763791] [] ? __blocking_notifier_call_chain+0x4d/0x63 <4>[ 187.763804] [] ? register_framebuffer+0x271/0x29e <4>[ 187.764049] [] ? intelfb_create+0x309/0x388 [i915] <4>[ 187.764098] [] ? drm_fb_helper_initial_config+0x304/0x389 [drm_kms_helper] <4>[ 187.764110] [] ? async_run_entry_fn+0x6b/0x131 <4>[ 187.764120] [] ? process_one_work+0x214/0x394 <4>[ 187.764130] [] ? worker_thread+0x33f/0x40a <4>[ 187.764141] [] ? preempt_schedule_common+0x1b/0x2f <4>[ 187.764151] [] ? process_one_work+0x394/0x394 <4>[ 187.764161] [] ? kthread+0xca/0xd2 <4>[ 187.764174] [] ? kthread_freezable_should_stop+0x47/0x47 <4>[ 187.764186] [] ? ret_from_fork+0x3f/0x70 <4>[ 187.764198] [] ? kthread_freezable_should_stop+0x47/0x47 <4>[ 187.764252] ---[ end trace c93b23233297080b ]---