[ 1927.477408] ------------[ cut here ]------------
[ 1927.477424] WARNING: CPU: 3 PID: 14531 at drivers/gpu/drm/drm_ioctl.c:143 drm_setversion+0x17e/0x190()
[ 1927.477503] No drm_driver.set_busid() implementation provided by nvidia_frontend_exit_module [nvidia]. Use drm_dev_set_unique() to set the unique name explicitly.
[ 1927.477507] Modules linked in:
[ 1927.477510]  nvidia(PO) bbswitch(O) ath9k_htc ath9k_common ath9k_hw ath iwldvm r8169 iwlwifi x86_pkg_temp_thermal mii rtsx_pci mfd_core [last unloaded: nvidia]
[ 1927.477533] CPU: 3 PID: 14531 Comm: Xorg Tainted: P        W  O   3.18.0-gentoo #4
[ 1927.477537] Hardware name: CLEVO CO.                        W2xxHSQ                         /W2xxHSQ                         , BIOS 4.6.4 12/09/2011
[ 1927.477540]  0000000000000009 ffff8801e417bcc8 ffffffff8183972a 0000000000000000
[ 1927.477546]  ffff8801e417bd18 ffff8801e417bd08 ffffffff810498cc ffff8801e417bce8
[ 1927.477551]  ffff8801e417bdf8 ffff880223a22800 ffff8801b9c30540 ffff880223a22800
[ 1927.477557] Call Trace:
[ 1927.477566]  [<ffffffff8183972a>] dump_stack+0x46/0x58
[ 1927.477576]  [<ffffffff810498cc>] warn_slowpath_common+0x7c/0xa0
[ 1927.477582]  [<ffffffff81049931>] warn_slowpath_fmt+0x41/0x50
[ 1927.477589]  [<ffffffff813f529e>] drm_setversion+0x17e/0x190
[ 1927.477596]  [<ffffffff8116320f>] ? path_openat+0xaf/0x630
[ 1927.477602]  [<ffffffff813f4cdc>] drm_ioctl+0x2dc/0x630
[ 1927.477607]  [<ffffffff813f5120>] ? drm_noop+0x30/0x30
[ 1927.477612]  [<ffffffff81164855>] ? do_filp_open+0x35/0x90
[ 1927.477619]  [<ffffffff81166cc8>] do_vfs_ioctl+0x2c8/0x4a0
[ 1927.477626]  [<ffffffff812cd027>] ? file_has_perm+0x87/0xa0
[ 1927.477632]  [<ffffffff81166f21>] SyS_ioctl+0x81/0xa0
[ 1927.477639]  [<ffffffff81842b52>] system_call_fastpath+0x12/0x17
[ 1927.477643] ---[ end trace e94dcf8fe6a472ae ]---