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[Bug 1576616] Re: Monitor intermittently turns off and back on again
Daniel, the next step is to fully reverse commit bisect from kernel 4.4
to 4.6-rc6 in order to identify the last bad commit, followed
immediately by the first good one. Once this good commit has been
identified, it may be reviewed for backporting. Could you please do this
Please note, finding adjacent kernel versions is not fully commit
After the fix commit (not kernel version) has been identified, then
please mark this report Status Confirmed.
Thank you for your understanding.
Helpful bug reporting tips:
** Tags added: bios-outdated-a13 kernel-fixed-upstream-4.6-rc6 needs-
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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Monitor intermittently turns off and back on again
Status in linux package in Ubuntu:
I'm experiencing an issue after upgrading from Xubuntu 15.10 to 16.04. I'm using a Dell Latitude E7450, attached to a docking station, and connected to two Dell U2715H via mDP, both displaying 2560x1440.
Each of the displays intermittently turns off for about 2 or 3 seconds, and then turns back on again. I couldn't tell whether this behaviour is specifically triggered by anything - it seems to happen randomly. There is no notification from the screen's OSD when it goes black.
The issue does not occur when the system is booted with the previously installed kernel, 4.2.0-35-generic.
Please let me know if you need any further information.
DistroRelease: Ubuntu 16.04
Package: linux-image-4.4.0-21-generic 4.4.0-21.37
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic x86_64
USER PID ACCESS COMMAND
/dev/snd/controlC1: dkozar 1793 F.... pulseaudio
/dev/snd/controlC0: dkozar 1793 F.... pulseaudio
Date: Fri Apr 29 11:57:51 2016
InstallationDate: Installed on 2015-10-28 (184 days ago)
InstallationMedia: Xubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
MachineType: Dell Inc. Latitude E7450
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-21-generic.efi.signed root=UUID=4dc74fbd-1097-4419-a15f-7dbac52da6e0 ro quiet splash vt.handoff=7
UpgradeStatus: Upgraded to xenial on 2016-04-29 (0 days ago)
dmi.bios.vendor: Dell Inc.
dmi.board.vendor: Dell Inc.
dmi.chassis.vendor: Dell Inc.
dmi.product.name: Latitude E7450
dmi.sys.vendor: Dell Inc.
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