** Package changed: xorg (Ubuntu) => xorg-server (Ubuntu)
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1763975
Title:
DP1.2 daisy-chain flickering
Status in linux package in Ubuntu:
New
Status in xorg-server package in Ubuntu:
New
Bug description:
Hi all,
I have a NUC7i7BNH with the latest BIOS (0062) running Ubuntu 18.04
(uname -r = 4.15.0-15-generic). I have the NUC connected via USB-C to
DisplayPort, to an Avocent SV340D KVM, then to a Dell U2415 which has
DP1.2 enabled and is daisy-chainged to another Dell U2415 (DP1.2
disabled on the second monitor as per Dell instructions).
I am getting flickering whereby randomly display1 or display2 turn
black and then back on again. When I disable DP1.2 on the display1,
and therefore get a duplicate display (as opposed to extended) on
display2, I get no flickering at all.
The same setup yields no flickering when running from a Windows 10
box, so don't think it is the monitors.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xorg 1:7.7+19ubuntu6
ProcVersionSignature: Ubuntu 4.15.0-15.16-generic 4.15.15
Uname: Linux 4.15.0-15-generic x86_64
ApportVersion: 2.20.9-0ubuntu4
Architecture: amd64
BootLog: Error: [Errno 13] Permission denied: '/var/log/boot.log'
CompizPlugins: No value set for
`/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: None
CurrentDesktop: ubuntu:GNOME
Date: Sat Apr 14 12:52:24 2018
DistUpgraded: Fresh install
DistroCodename: bionic
DistroVariant: ubuntu
ExtraDebuggingInterest: Yes
GraphicsCard:
Intel Corporation Device [8086:5927] (rev 06) (prog-if 00 [VGA controller])
Subsystem: Intel Corporation Device [8086:2068]
InstallationDate: Installed on 2018-04-01 (12 days ago)
InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Alpha amd64 (20180401)
MachineType: Intel Corporation NUC7i7BNH
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-15-generic.efi.signed
root=/dev/mapper/ubuntu--vg-root ro quiet splash
SourcePackage: xorg
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/22/2018
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BNKBL357.86A.0062.2018.0222.1644
dmi.board.name: NUC7i7BNB
dmi.board.vendor: Intel Corporation
dmi.board.version: J31145-307
dmi.chassis.type: 3
dmi.chassis.vendor: Intel Corporation
dmi.chassis.version: 2
dmi.modalias:
dmi:bvnIntelCorp.:bvrBNKBL357.86A.0062.2018.0222.1644:bd02/22/2018:svnIntelCorporation:pnNUC7i7BNH:pvrJ31153-308:rvnIntelCorporation:rnNUC7i7BNB:rvrJ31145-307:cvnIntelCorporation:ct3:cvr2:
dmi.product.family: Intel NUC
dmi.product.name: NUC7i7BNH
dmi.product.version: J31153-308
dmi.sys.vendor: Intel Corporation
version.compiz: compiz N/A
version.libdrm2: libdrm2 2.4.91-2
version.libgl1-mesa-dri: libgl1-mesa-dri 18.0.0~rc5-1ubuntu1
version.libgl1-mesa-glx: libgl1-mesa-glx 18.0.0~rc5-1ubuntu1
version.xserver-xorg-core: xserver-xorg-core 2:1.19.6-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev N/A
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:18.0.1-1
version.xserver-xorg-video-intel: xserver-xorg-video-intel
2:2.99.917+git20171229-1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.15-2
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