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Booting kernel 4.3.5-300.fc23.i686+PAE on my machine logs the following error in the journal: WARNING: CPU: 0 PID: 56 at drivers/gpu/drm/drm_atomic.c:491 drm_atomic_check_only+0x4bf/0x5a0 [drm]() Modules linked in: i915 i2c_algo_bit drm_kms_helper e1000e drm ata_generic serio_raw pata_acpi ptp pps_core video fjes asix usbnet mii CPU: 0 PID: 56 Comm: kworker/u4:1 Not tainted 4.3.5-300.fc23.i686+PAE #1 Hardware name: MSI MS-9A25/MS-9852, BIOS V1.0b0 10/21/2009 Workqueue: events_unbound async_run_entry_fn c0db2967 cb2a7038 00000000 f48bbb80 c07326e0 00000000 f48bbbb0 c046f567 c0cc2484 00000000 00000038 f8248b98 000001eb f823a1ef f823a1ef f492f800 f4a90278 00000000 f48bbbc0 c046f672 00000009 00000000 f48bbc0c f823a1ef Call Trace: [<c07326e0>] dump_stack+0x41/0x61 [<c046f567>] warn_slowpath_common+0x87/0xc0 [<f823a1ef>] ? drm_atomic_check_only+0x4bf/0x5a0 [drm] [<f823a1ef>] ? drm_atomic_check_only+0x4bf/0x5a0 [drm] [<c046f672>] warn_slowpath_null+0x22/0x30 [<f823a1ef>] drm_atomic_check_only+0x4bf/0x5a0 [drm] [<f82394d9>] ? drm_atomic_set_crtc_for_plane+0x69/0x100 [drm] [<f823a3b8>] ? drm_atomic_set_fb_for_plane+0x28/0xa0 [drm] [<f823a2e6>] drm_atomic_commit+0x16/0x60 [drm] [<f851b697>] intel_get_load_detect_pipe+0x417/0x5f0 [i915] [<f8553506>] intel_tv_detect+0x106/0x660 [i915] [<f8227fd9>] ? drm_mode_object_get_reg+0x69/0x80 [drm] [<f8304beb>] drm_helper_probe_single_connector_modes_merge_bits+0x20b/0x480 [drm_kms_helper] [<f8304e77>] drm_helper_probe_single_connector_modes+0x17/0x20 [drm_kms_helper] [<f8310092>] drm_fb_helper_initial_config+0x72/0x3e0 [drm_kms_helper] [<c04a7b19>] ? pick_next_task_fair+0x429/0x4e0 [<f852c199>] intel_fbdev_initial_config+0x19/0x20 [i915] [<c048d7fe>] async_run_entry_fn+0x4e/0x170 [<c0485b75>] process_one_work+0x145/0x380 [<c0485de9>] worker_thread+0x39/0x430 [<c0485db0>] ? process_one_work+0x380/0x380 [<c048b126>] kthread+0xa6/0xc0 [<c0afca01>] ret_from_kernel_thread+0x21/0x30 [<c048b080>] ? kthread_worker_fn+0x130/0x130 and this one for CPU 1: WARNING: CPU: 1 PID: 284 at drivers/gpu/drm/drm_atomic.c:491 drm_atomic_check_only+0x4bf/0x5a0 [drm]() Modules linked in: i915 i2c_algo_bit drm_kms_helper e1000e drm ata_generic serio_raw pata_acpi ptp pps_core video fjes asix usbnet mii CPU: 1 PID: 284 Comm: plymouthd Tainted: G W 4.3.5-300.fc23.i686+PAE #1 Hardware name: MSI MS-9A25/MS-9852, BIOS V1.0b0 10/21/2009 c0db2967 0df440b4 00000000 f4b57ad0 c07326e0 00000000 f4b57b00 c046f567 c0cc2484 00000001 0000011c f8248b98 000001eb f823a1ef f823a1ef f492f800 f4aaac90 00000000 f4b57b10 c046f672 00000009 00000000 f4b57b5c f823a1ef Call Trace: [<c07326e0>] dump_stack+0x41/0x61 [<c046f567>] warn_slowpath_common+0x87/0xc0 [<f823a1ef>] ? drm_atomic_check_only+0x4bf/0x5a0 [drm] [<f823a1ef>] ? drm_atomic_check_only+0x4bf/0x5a0 [drm] [<c046f672>] warn_slowpath_null+0x22/0x30 [<f823a1ef>] drm_atomic_check_only+0x4bf/0x5a0 [drm] [<f82394d9>] ? drm_atomic_set_crtc_for_plane+0x69/0x100 [drm] [<f823a3b8>] ? drm_atomic_set_fb_for_plane+0x28/0xa0 [drm] [<f823a2e6>] drm_atomic_commit+0x16/0x60 [drm] [<f851b697>] intel_get_load_detect_pipe+0x417/0x5f0 [i915] [<f8553506>] intel_tv_detect+0x106/0x660 [i915] [<c049c707>] ? __update_cpu_load+0xc7/0x100 [<f8304beb>] drm_helper_probe_single_connector_modes_merge_bits+0x20b/0x480 [drm_kms_helper] [<c0afa290>] ? mutex_lock+0x10/0x30 [<f8304e77>] drm_helper_probe_single_connector_modes+0x17/0x20 [drm_kms_helper] [<f822d89d>] drm_mode_getconnector+0x28d/0x320 [drm] [<f822d610>] ? drm_mode_getcrtc+0x140/0x140 [drm] [<f821f103>] drm_ioctl+0x123/0x4d0 [drm] [<f822d610>] ? drm_mode_getcrtc+0x140/0x140 [drm] [<c05064a7>] ? audit_match_class+0x37/0x50 [<f821efe0>] ? drm_getmap+0xc0/0xc0 [drm] [<c05da862>] do_vfs_ioctl+0x2e2/0x500 [<c04032a7>] ? syscall_trace_enter_phase1+0x107/0x130 [<c04c64a7>] ? kmsg_dump_get_line_nolock+0xc7/0x120 [<c06c7904>] ? selinux_file_ioctl+0x54/0x100 [<c06bbf6c>] ? security_file_ioctl+0x3c/0x60 [<c05daae8>] SyS_ioctl+0x68/0x80 [<c04c64a7>] ? kmsg_dump_get_line_nolock+0xc7/0x120 [<c04c64a7>] ? kmsg_dump_get_line_nolock+0xc7/0x120 [<c0afcb61>] syscall_call+0x7/0x7 [<c04c64a7>] ? kmsg_dump_get_line_nolock+0xc7/0x120 [<c04c64a7>] ? kmsg_dump_get_line_nolock+0xc7/0x120
Let me know if I can help diagnose this further.
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