Public bug reported:
Symptom is that the LCD on the laptop (Dell Latitude E7450) stays off
after boot. The laptop is running fine and can be reached via SSH, and
rebooted. I can also kill the Xorg server at which point my display
manager starts a new session and restores the driver.
I believe the display driver is failing to resume as indicated by this kernel
log line:
Feb 2 19:08:33 LON-IX-L-763 kernel: [32839.947460] [drm:intel_display_resume
[i915]] *ERROR* Restoring old state failed with -22
This looks like a regression in a recent kernel; this worked fine for ~1
year on Ubuntu 15.10 but I didn't test it on 16.04 so I can't confirm if
it exists there.
I suspend the machine by running pm-suspend, and it is resumed by the
lid open event.
I've attached the relevant time from /var/log/syslog which shows the
kernel messages; this suspend was entered at 18:16:30 and woken up at
19:08:33.
ProblemType: Bug
DistroRelease: Ubuntu 16.10
Package: linux-image-extra-4.8.0-34-generic 4.8.0-34.36
ProcVersionSignature: Ubuntu 4.8.0-34.36-generic 4.8.11
Uname: Linux 4.8.0-34-generic x86_64
ApportVersion: 2.20.3-0ubuntu8.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC1D0p: pv 4009 F...m pulseaudio
/dev/snd/controlC1: pv 4009 F.... pulseaudio
/dev/snd/controlC0: pv 4009 F.... pulseaudio
/dev/snd/seq: pv 4126 F.... chrome
Date: Fri Feb 3 03:23:55 2017
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=adb71bac-b2c6-4c48-9f39-8b07f2b1d7b7
InstallationDate: Installed on 2015-07-24 (559 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
MachineType: Dell Inc. Latitude E7450
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.8.0-34-generic
root=UUID=3cd0b0b6-f38d-45bf-85aa-e6578b5e37c4 ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-4.8.0-34-generic N/A
linux-backports-modules-4.8.0-34-generic N/A
linux-firmware 1.161.1
SourcePackage: linux
UpgradeStatus: Upgraded to yakkety on 2016-12-19 (45 days ago)
dmi.bios.date: 11/18/2015
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A09
dmi.board.name: 0R1VJD
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 9
dmi.chassis.vendor: Dell Inc.
dmi.modalias:
dmi:bvnDellInc.:bvrA09:bd11/18/2015:svnDellInc.:pnLatitudeE7450:pvr:rvnDellInc.:rn0R1VJD:rvr:cvnDellInc.:ct9:cvr:
dmi.product.name: Latitude E7450
dmi.sys.vendor: Dell Inc.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug yakkety
** Attachment added: "resume-fail-syslog"
https://bugs.launchpad.net/bugs/1661475/+attachment/4812340/+files/resume-fail-syslog
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https://bugs.launchpad.net/bugs/1661475
Title:
i915 driver fails to resume display from suspend
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