Created attachment 176631 [details] full dmesg Lenovo Yoga 851F trying to use KMS but it fails with [ 3.714416] ------------[ cut here ]------------ [ 3.714434] WARNING: CPU: 3 PID: 265 at drivers/gpu/drm/drm_irq.c:1130 drm_wait_one_vblank+0x177/0x180() [ 3.714437] vblank wait timed out on crtc 0 [ 3.714440] Modules linked in: usbnet mii [ 3.714452] CPU: 3 PID: 265 Comm: plymouthd Not tainted 3.19.8.6 #123 [ 3.714455] Hardware name: LENOVO 60072/INVALID, BIOS 02WT18WW 08/01/2014 [ 3.714459] c0e11947 957b1170 00000000 f689dc98 c0afb870 f689dcd8 f689dcc8 c0449ad7 [ 3.714469] c0d78220 f689dcf8 00000109 c0d4b618 0000046a c07bffa7 c07bffa7 00000000 [ 3.714479] f400c800 00000000 f689dce4 c0449b4e 00000009 f689dcd8 c0d78220 f689dcf8 [ 3.714490] Call Trace: [ 3.714502] [<c0afb870>] dump_stack+0x41/0x52 [ 3.714510] [<c0449ad7>] warn_slowpath_common+0x87/0xc0 [ 3.714516] [<c07bffa7>] ? drm_wait_one_vblank+0x177/0x180 [ 3.714521] [<c07bffa7>] ? drm_wait_one_vblank+0x177/0x180 [ 3.714527] [<c0449b4e>] warn_slowpath_fmt+0x3e/0x60 [ 3.714533] [<c07bffa7>] drm_wait_one_vblank+0x177/0x180 [ 3.714541] [<c0841772>] ? intel_psr_flush+0x72/0xd0 [ 3.714547] [<c04804f0>] ? prepare_to_wait_event+0xc0/0xc0 [ 3.714553] [<c08313a0>] intel_pipe_set_base+0x120/0x1f0 [ 3.714559] [<c083b9ec>] intel_crtc_set_config+0x9bc/0xd80 [ 3.714566] [<c07c7cbe>] drm_mode_set_config_internal+0x4e/0xc0 [ 3.714572] [<c07cb636>] drm_mode_setcrtc+0xc6/0x560 [ 3.714578] [<c07cb570>] ? drm_mode_setplane+0x230/0x230 [ 3.714583] [<c07be55f>] drm_ioctl+0x1cf/0x520 [ 3.714590] [<c055f705>] ? kmem_cache_alloc_trace+0x175/0x1e0 [ 3.714597] [<c0521952>] ? free_hot_cold_page_list+0x42/0x90 [ 3.714602] [<c07cb570>] ? drm_mode_setplane+0x230/0x230 [ 3.714609] [<c06864a2>] ? bio_clone_bioset+0x82/0x2b0 [ 3.714615] [<c07be390>] ? drm_getmap+0xc0/0xc0 [ 3.714621] [<c0580b9a>] do_vfs_ioctl+0x30a/0x510 [ 3.714628] [<c0652582>] ? inode_has_perm.isra.32+0x32/0x40 [ 3.714633] [<c06526d7>] ? file_has_perm+0x97/0xa0 [ 3.714639] [<c065342c>] ? selinux_file_ioctl+0x4c/0xf0 [ 3.714645] [<c0580e00>] SyS_ioctl+0x60/0x90 [ 3.714650] [<c06864a2>] ? bio_clone_bioset+0x82/0x2b0 [ 3.714655] [<c06864a2>] ? bio_clone_bioset+0x82/0x2b0 [ 3.714662] [<c0b044cf>] sysenter_do_call+0x12/0x12 [ 3.714667] [<c06864a2>] ? bio_clone_bioset+0x82/0x2b0 [ 3.714672] [<c06864a2>] ? bio_clone_bioset+0x82/0x2b0 [ 3.714678] [<c0b00000>] ? __schedule+0x620/0x730 [ 3.714682] ---[ end trace 4d2ee9409150afdc ]---
Created attachment 176641 [details] dmidecode
Created attachment 176651 [details] lspci
Created attachment 176661 [details] interrupts
Presumed fixed upstream. If the problem persists with latest kernels, please file a bug at the freedesktop.org bugzilla [1], referencing this bug. Thank you. [1] https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel