| 2018-08-21 22:44:39 |
Wojciech |
bug |
|
|
added bug |
| 2018-08-21 22:44:39 |
Wojciech |
attachment added |
|
edid-decoded.txt https://bugs.launchpad.net/bugs/1788308/+attachment/5178901/+files/edid-decoded.txt |
|
| 2018-08-21 22:45:17 |
Wojciech |
attachment removed |
WifiSyslog.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788308/+attachment/5178916/+files/WifiSyslog.txt |
|
|
| 2018-08-21 22:46:01 |
Wojciech |
attachment added |
|
edid.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788308/+attachment/5178917/+files/edid.txt |
|
| 2018-08-21 22:46:10 |
Wojciech |
attachment removed |
edid-decoded.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788308/+attachment/5178901/+files/edid-decoded.txt |
|
|
| 2018-08-21 22:46:20 |
Wojciech |
attachment added |
|
edid-decoded.txt https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788308/+attachment/5178918/+files/edid-decoded.txt |
|
| 2018-08-21 22:46:31 |
Wojciech |
attachment added |
|
lspci-vnvn.log https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788308/+attachment/5178919/+files/lspci-vnvn.log |
|
| 2018-08-21 22:46:41 |
Wojciech |
attachment added |
|
version.log https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1788308/+attachment/5178920/+files/version.log |
|
| 2018-08-21 23:00:08 |
Ubuntu Kernel Bot |
linux (Ubuntu): status |
New |
Confirmed |
|
| 2018-08-22 10:31:28 |
Wojciech |
description |
The problem affects the integrated display on a Lenovo B50-80 notebook.
Colour banding is visible everywhere on the system, as dithering seems not to be enabled. This issue was not present on non-HWE Ubuntu 16.04, and it showed up after upgrading to Ubuntu 18.04. There was already a bug #1749420 that was resolved (https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1749420) with very similar symptoms, albeit the make and model of a LCD screen in that case was different. However, the source of this problem is probably the same, since I have checked that pre-4.8.0-rc2 kernels handled dithering correctly, and 4.8.0-rc2 and later kernels already had the bug described. Therefore, I believe that adding another quirk may fix the problem.
I attached the results of running
sudo get-edid | parse-edid in a file named edid.txt
and
sudo get-edid | edid-decode in a file named edid-decoded.txt.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-32-generic 4.15.0-32.35
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: me 1245 F.... pulseaudio
/dev/snd/controlC1: me 1245 F.... pulseaudio
Date: Wed Aug 22 00:26:15 2018
HibernationDevice: RESUME=UUID=93b28df5-b453-452b-960d-7173994d778e
InstallationDate: Installed on 2018-08-21 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 80EW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-32-generic root=UUID=a1cd5b8c-2707-4840-858b-3ca12517193b ro quiet splash vt.handoff=1
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.15.0-32-generic N/A
linux-backports-modules-4.15.0-32-generic N/A
linux-firmware 1.173.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/02/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: A8CN54WW(V3.07)
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Lenovo B50-80
dmi.board.vendor: LENOVO
dmi.board.version: 31900058 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo B50-80
dmi.modalias: dmi:bvnLENOVO:bvrA8CN54WW(V3.07):bd09/02/2016:svnLENOVO:pn80EW:pvrLenovoB50-80:rvnLENOVO:rnLenovoB50-80:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoB50-80:
dmi.product.family: IDEAPAD
dmi.product.name: 80EW
dmi.product.version: Lenovo B50-80
dmi.sys.vendor: LENOVO |
The problem affects the integrated display on a Lenovo B50-80 notebook.
Colour banding is visible everywhere on the system, as dithering seems not to be enabled on this 6bpp display. This issue was not present on non-HWE Ubuntu 16.04, and it showed up after I upgraded to Ubuntu 18.04. There was already a very similar bug #1749420 that had a fix released, however, because the make and model of an LCD screen in that case was different, the quirk added to the kernel did not address the problem that affects my machine. The cause of this issue is probably the same, since I have checked that pre-4.8.0-rc2 kernels handled dithering correctly, and 4.8.0-rc2 and later kernels already had the bug described. I believe that adding quirk for an another type of display may fix the problem.
I attached the results of running
sudo get-edid | parse-edid in a file named edid.txt
and
sudo get-edid | edid-decode in a file named edid-decoded.txt.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: linux-image-4.15.0-32-generic 4.15.0-32.35
ProcVersionSignature: Ubuntu 4.15.0-32.35-generic 4.15.18
Uname: Linux 4.15.0-32-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC0: me 1245 F.... pulseaudio
/dev/snd/controlC1: me 1245 F.... pulseaudio
Date: Wed Aug 22 00:26:15 2018
HibernationDevice: RESUME=UUID=93b28df5-b453-452b-960d-7173994d778e
InstallationDate: Installed on 2018-08-21 (0 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
MachineType: LENOVO 80EW
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.15.0-32-generic root=UUID=a1cd5b8c-2707-4840-858b-3ca12517193b ro quiet splash vt.handoff=1
PulseList:
Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
linux-restricted-modules-4.15.0-32-generic N/A
linux-backports-modules-4.15.0-32-generic N/A
linux-firmware 1.173.1
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/02/2016
dmi.bios.vendor: LENOVO
dmi.bios.version: A8CN54WW(V3.07)
dmi.board.asset.tag: NO Asset Tag
dmi.board.name: Lenovo B50-80
dmi.board.vendor: LENOVO
dmi.board.version: 31900058 WIN
dmi.chassis.asset.tag: NO Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Lenovo B50-80
dmi.modalias: dmi:bvnLENOVO:bvrA8CN54WW(V3.07):bd09/02/2016:svnLENOVO:pn80EW:pvrLenovoB50-80:rvnLENOVO:rnLenovoB50-80:rvr31900058WIN:cvnLENOVO:ct10:cvrLenovoB50-80:
dmi.product.family: IDEAPAD
dmi.product.name: 80EW
dmi.product.version: Lenovo B50-80
dmi.sys.vendor: LENOVO |
|
| 2018-08-22 16:56:01 |
Joseph Salisbury |
linux (Ubuntu): importance |
Undecided |
Medium |
|
| 2018-08-22 16:57:28 |
Joseph Salisbury |
linux (Ubuntu): status |
Confirmed |
Incomplete |
|
| 2018-08-22 16:57:48 |
Joseph Salisbury |
tags |
amd64 apport-bug bionic visual-quality |
amd64 apport-bug bionic kernel-da-key visual-quality |
|
| 2018-08-22 17:32:19 |
Wojciech |
tags |
amd64 apport-bug bionic kernel-da-key visual-quality |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key visual-quality |
|
| 2018-08-22 17:32:28 |
Wojciech |
linux (Ubuntu): status |
Incomplete |
Confirmed |
|
| 2018-08-23 05:59:05 |
Kai-Heng Feng |
linux (Ubuntu): assignee |
|
Kai-Heng Feng (kaihengfeng) |
|
| 2018-10-05 16:18:09 |
Seth Forshee |
linux (Ubuntu): status |
Confirmed |
Fix Committed |
|
| 2018-10-12 13:48:54 |
Launchpad Janitor |
linux (Ubuntu): status |
Fix Committed |
Fix Released |
|
| 2018-10-12 13:48:54 |
Launchpad Janitor |
cve linked |
|
2018-14633 |
|
| 2018-10-12 13:48:54 |
Launchpad Janitor |
cve linked |
|
2018-5391 |
|
| 2018-10-13 11:31:53 |
Wojciech |
tags |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key visual-quality |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key verification-done-cosmic visual-quality |
|
| 2019-02-14 13:11:20 |
Brad Figg |
tags |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key verification-done-cosmic visual-quality |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key verification-done-cosmic verification-needed-bionic visual-quality |
|
| 2019-02-14 13:30:56 |
Wojciech |
tags |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key verification-done-cosmic verification-needed-bionic visual-quality |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key verification-done-bionic verification-done-cosmic visual-quality |
|
| 2019-07-23 22:56:59 |
Juerg Haefliger |
nominated for series |
|
Ubuntu Bionic |
|
| 2019-07-23 22:56:59 |
Juerg Haefliger |
bug task added |
|
linux (Ubuntu Bionic) |
|
| 2019-07-23 22:57:12 |
Juerg Haefliger |
linux (Ubuntu Bionic): status |
New |
Fix Committed |
|
| 2019-07-24 21:14:42 |
Brad Figg |
tags |
amd64 apport-bug bionic kernel-bug-exists-upstream kernel-da-key verification-done-bionic verification-done-cosmic visual-quality |
amd64 apport-bug bionic cscc kernel-bug-exists-upstream kernel-da-key verification-done-bionic verification-done-cosmic visual-quality |
|
| 2019-08-07 08:34:27 |
Ubuntu Kernel Bot |
tags |
amd64 apport-bug bionic cscc kernel-bug-exists-upstream kernel-da-key verification-done-bionic verification-done-cosmic visual-quality |
amd64 apport-bug bionic cscc kernel-bug-exists-upstream kernel-da-key verification-done-bionic verification-done-cosmic verification-needed-xenial visual-quality |
|
| 2019-08-08 07:54:49 |
Wojciech |
tags |
amd64 apport-bug bionic cscc kernel-bug-exists-upstream kernel-da-key verification-done-bionic verification-done-cosmic verification-needed-xenial visual-quality |
amd64 apport-bug bionic cscc kernel-bug-exists-upstream kernel-da-key verification-done-bionic verification-done-cosmic verification-done-xenial visual-quality |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
linux (Ubuntu Bionic): status |
Fix Committed |
Fix Released |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2000-1134 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2007-3852 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2008-0525 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2009-0416 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2011-4834 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2015-1838 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2015-7442 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2016-7489 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2018-5383 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-10126 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-1125 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-12614 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-12818 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-12819 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-12984 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-13233 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-13272 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-2101 |
|
| 2019-08-13 11:27:47 |
Launchpad Janitor |
cve linked |
|
2019-3846 |
|
