The following error (warning?) shows up in dmesg during every boot:
[ 3.244312] ------------[ cut here ]------------
[ 3.244397] WARNING: CPU: 0 PID: 170 at /build/linux-Nasqxe/linux-4.4.0/drivers/gpu/drm/i915/intel_fbdev.c:406 intel_fb_initial_config+0x2d4/0x5f0 [i915]()
[ 3.244410] WARN_ON(!encoder->crtc)
[ 3.244413] Modules linked in:
[ 3.244419] i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops b44 drm ahci ssb psmouse pata_acpi libahci mii wmi fjes video
[ 3.244451] CPU: 0 PID: 170 Comm: kworker/u4:6 Not tainted 4.4.0-66-generic #87-Ubuntu
[ 3.244462] Hardware name: Hewlett-Packard HP Compaq nx7400 (RB525UT#ABA)/30A2, BIOS 68YGU Ver. F.07 07/28/2006
[ 3.244477] Workqueue: events_unbound async_run_entry_fn
[ 3.244484] c1adf967 ebf0fd93 00000286 f5da5d04 c13ac15f f5da5d44 f8d3b99c f5da5d34
[ 3.244499] c1070457 f8d46600 f5da5d64 000000aa f8d3b99c 00000196 f8ceb9a4 f8ceb9a4
[ 3.244514] 00000000 00000001 00000001 f5da5d50 c10704ce 00000009 f5da5d44 f8d46600
[ 3.244530] Call Trace:
[ 3.244541] [<c13ac15f>] dump_stack+0x58/0x79
[ 3.244550] [<c1070457>] warn_slowpath_common+0x87/0xc0
[ 3.244615] [<f8ceb9a4>] ? intel_fb_initial_config+0x2d4/0x5f0 [i915]
[ 3.244678] [<f8ceb9a4>] ? intel_fb_initial_config+0x2d4/0x5f0 [i915]
[ 3.244687] [<c10704ce>] warn_slowpath_fmt+0x3e/0x60
[ 3.244750] [<f8ceb9a4>] intel_fb_initial_config+0x2d4/0x5f0 [i915]
[ 3.244759] [<c13ad8d4>] ? idr_alloc+0xa4/0x120
[ 3.244823] [<f8ceb6d0>] ? intel_crtc_fb_gamma_get+0x40/0x40 [i915]
[ 3.244847] [<f85c0d0f>] drm_setup_crtcs+0x21f/0xa90 [drm_kms_helper]
[ 3.244866] [<f85b4d23>] ? drm_helper_probe_single_connector_modes_merge_bits+0x1e3/0x480 [drm_kms_helper]
[ 3.244879] [<c17b9acd>] ? schedule+0x2d/0x80
[ 3.244898] [<f85c182c>] drm_fb_helper_initial_config+0xbc/0x400 [drm_kms_helper]
[ 3.244911] [<c10a6f13>] ? put_prev_entity+0x33/0xcc0
[ 3.244919] [<c10aa281>] ? pick_next_task_fair+0x501/0x520
[ 3.244982] [<f8cec899>] intel_fbdev_initial_config+0x19/0x20 [i915]
[ 3.244991] [<c108f6ce>] async_run_entry_fn+0x4e/0x170
[ 3.245000] [<c10878a1>] process_one_work+0x121/0x3f0
[ 3.245009] [<c1087ba7>] worker_thread+0x37/0x490
[ 3.245017] [<c1087b70>] ? process_one_work+0x3f0/0x3f0
[ 3.245025] [<c108d056>] kthread+0xa6/0xc0
[ 3.245034] [<c17bd449>] ret_from_kernel_thread+0x21/0x38
[ 3.245042] [<c108cfb0>] ? kthread_create_on_node+0x170/0x170
[ 3.245049] ---[ end trace 0bd04c67fb0cdbfa ]---
[ 3.251264] fbcon: inteldrmfb (fb0) is primary device
[ 3.251911] ------------[ cut here ]------------
[ 3.251933] WARNING: CPU: 0 PID: 170 at /build/linux-Nasqxe/linux-4.4.0/drivers/gpu/drm/drm_atomic_helper.c:723 drm_atomic_helper_update_legacy_modeset_state+0x26a/0x280 [drm_kms_helper]()
[ 3.251945] Modules linked in: i915 i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops b44 drm ahci ssb psmouse pata_acpi libahci mii wmi fjes video
[ 3.251949] CPU: 0 PID: 170 Comm: kworker/u4:6 Tainted: G W 4.4.0-66-generic #87-Ubuntu
[ 3.251950] Hardware name: Hewlett-Packard HP Compaq nx7400 (RB525UT#ABA)/30A2, BIOS 68YGU Ver. F.07 07/28/2006
[ 3.251956] Workqueue: events_unbound async_run_entry_fn
[ 3.251962] c1adf967 ebf0fd93 00000286 f5da5b3c c13ac15f 00000000 f85c51f0 f5da5b6c
[ 3.251966] c1070457 c19d054c 00000000 000000aa f85c51f0 000002d3 f85bb98a f85bb98a
[ 3.251970] f67f8800 00000000 f07fc400 f5da5b7c c1070562 00000009 00000000 f5da5ba4
[ 3.251971] Call Trace:
[ 3.251977] [<c13ac15f>] dump_stack+0x58/0x79
[ 3.251981] [<c1070457>] warn_slowpath_common+0x87/0xc0
[ 3.251994] [<f85bb98a>] ? drm_atomic_helper_update_legacy_modeset_state+0x26a/0x280 [drm_kms_helper]
[ 3.252007] [<f85bb98a>] ? drm_atomic_helper_update_legacy_modeset_state+0x26a/0x280 [drm_kms_helper]
[ 3.252010] [<c1070562>] warn_slowpath_null+0x22/0x30
[ 3.252023] [<f85bb98a>] drm_atomic_helper_update_legacy_modeset_state+0x26a/0x280 [drm_kms_helper]
[ 3.252023] [<f8cd6818>] ? intel_pre_plane_update+0xd8/0x130 [i915]
[ 3.252023] [<f8cd720a>] intel_atomic_commit+0x52a/0x6a0 [i915]
[ 3.252023] [<f8acf48e>] ? drm_atomic_check_only+0x1ae/0x600 [drm]
[ 3.252023] [<f8ace129>] ? drm_modeset_lock+0x49/0xd0 [drm]
[ 3.252023] [<f8acea6c>] ? drm_atomic_set_crtc_for_connector+0x5c/0xe0 [drm]
[ 3.252023] [<f8acf912>] drm_atomic_commit+0x32/0x60 [drm]
[ 3.252023] [<f85bf673>] restore_fbdev_mode+0x253/0x290 [drm_kms_helper]
[ 3.252023] [<f8ace244>] ? drm_modeset_lock_all_ctx+0x94/0xb0 [drm]
[ 3.252023] [<f85c16c7>] drm_fb_helper_restore_fbdev_mode_unlocked+0x27/0x70 [drm_kms_helper]
[ 3.252023] [<f85c173d>] drm_fb_helper_set_par+0x2d/0x60 [drm_kms_helper]
[ 3.252023] [<f8cebd75>] intel_fbdev_set_par+0x15/0x50 [i915]
[ 3.252023] [<c142920d>] fbcon_init+0x54d/0x5a0
[ 3.252023] [<c17b31ce>] ? klist_node_init+0x2e/0x50
[ 3.252023] [<c14b3d6b>] visual_init+0xbb/0x120
[ 3.252023] [<c14b5ae2>] do_bind_con_driver+0x172/0x350
[ 3.252023] [<c13aeb91>] ? kobject_set_name_vargs+0x61/0x90
[ 3.252023] [<c14b5fce>] do_take_over_console+0x13e/0x1c0
[ 3.252023] [<c142515f>] do_fbcon_takeover+0x5f/0xc0
[ 3.252023] [<c1429c67>] fbcon_event_notify+0x687/0x780
[ 3.252023] [<c108de0e>] notifier_call_chain+0x4e/0x70
[ 3.252023] [<c108e149>] __blocking_notifier_call_chain+0x39/0x60
[ 3.252023] [<c108e18f>] blocking_notifier_call_chain+0x1f/0x30
[ 3.252023] [<c142ef26>] fb_notifier_call_chain+0x16/0x20
[ 3.252023] [<c1430ca1>] register_framebuffer+0x1f1/0x330
[ 3.252023] [<f85c19dc>] drm_fb_helper_initial_config+0x26c/0x400 [drm_kms_helper]
[ 3.252023] [<c10a6f13>] ? put_prev_entity+0x33/0xcc0
[ 3.252023] [<f8cec899>] intel_fbdev_initial_config+0x19/0x20 [i915]
[ 3.252023] [<c108f6ce>] async_run_entry_fn+0x4e/0x170
[ 3.252023] [<c10878a1>] process_one_work+0x121/0x3f0
[ 3.252023] [<c1087ba7>] worker_thread+0x37/0x490
[ 3.252023] [<c1087b70>] ? process_one_work+0x3f0/0x3f0
[ 3.252023] [<c108d056>] kthread+0xa6/0xc0
[ 3.252023] [<c17bd449>] ret_from_kernel_thread+0x21/0x38
[ 3.252023] [<c108cfb0>] ? kthread_create_on_node+0x170/0x170
[ 3.252565] ---[ end trace 0bd04c67fb0cdbfb ]---
/proc/version_signature : Ubuntu 4.4.0-66.87-generic 4.4.44
Description: Ubuntu 16.04.2 LTS
Release: 16.04
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-66-generic 4.4.0-66.87
ProcVersionSignature: Ubuntu 4.4.0-66.87-generic 4.4.44
Uname: Linux 4.4.0-66-generic i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.4.0-66-generic.
ApportVersion: 2.20.1-0ubuntu2.5
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: davek 2175 F.... pulseaudio
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xf4580000 irq 27'
Mixer name : 'Analog Devices AD1981'
Components : 'HDA:11d41981,103c30a2,00100200 HDA:11c13026,103c30a2,00100700'
Controls : 34
Simple ctrls : 17
CurrentDesktop: LXDE
Date: Sun Mar 12 15:14:43 2017
HibernationDevice: RESUME=UUID=63b899e1-b597-4a6c-9295-5403efb298d6
InstallationDate: Installed on 2016-07-12 (243 days ago)
InstallationMedia: Ubuntu-Server 16.04 LTS "Xenial Xerus" - Release i386 (20160420.3)
Lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
MachineType: Hewlett-Packard HP Compaq nx7400 (RB525UT#ABA)
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.4.0-66-generic root=UUID=e8da51fc-5ebb-4d97-aaeb-0ba3f9856171 ro
RelatedPackageVersions:
linux-restricted-modules-4.4.0-66-generic N/A
linux-backports-modules-4.4.0-66-generic N/A
linux-firmware 1.157.8
RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 07/28/2006
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: 68YGU Ver. F.07
dmi.board.name: 30A2
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 40.16
dmi.chassis.asset.tag: CNU6362XLV
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias: dmi:bvnHewlett-Packard:bvr68YGUVer.F.07:bd07/28/2006:svnHewlett-Packard:pnHPCompaqnx7400(RB525UT#ABA):pvrF.07:rvnHewlett-Packard:rn30A2:rvrKBCVersion40.16:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP Compaq nx7400 (RB525UT#ABA)
dmi.product.version: F.07
dmi.sys.vendor: Hewlett-Packard
This change was made by a bot.