apport information ** Attachment added: "IwConfig.txt" https://bugs.launchpad.net/bugs/1776642/+attachment/5152143/+files/IwConfig.txt
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1776642 Title: Temporal dithering started appearing on Intel HD 530 graphics Status in linux package in Ubuntu: Confirmed Bug description: I am experiencing a regression in linux-image-generic-hwe-16.04 with Intel HD Graphics 530 (Core i5-6600T), starting in 4.13.0-43 (considering only kernels which appear in my GRUB menu). Some form of spatio-temporal dithering has been enabled. This is causing a shimmering effect and visible dithering patterns (like woven textile) which are noticeable on photographs and areas of similar colour. 1px borders in the UI can appear to have a "marching ants" effect. The effect is visible both under Xorg and in a virtual console (Ctrl+Alt+F1), if the displayed colours are suitable to trigger it. Booting 4.13.0-41 eliminates the temporal dithering. This occurs on a (presumed) 6bpp laptop LCD panel, so dithering is necessary, but in previous kernels only a form of spatial dithering is applied, which is less visually obvious. --- ApportVersion: 2.20.1-0ubuntu2.18 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: patrick 1976 F.... pulseaudio DistroRelease: Ubuntu 16.04 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=72e179a8-b27c-42d3-9523-8f1cceacaa64 InstallationDate: Installed on 2016-09-16 (634 days ago) InstallationMedia: Kubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: PC Specialist Limited N350DW Package: linux (not installed) ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-4.13.0-45-generic root=UUID=deeef076-c1e1-47ec-8ee4-d3b56fa179f9 ro quiet splash vt.handoff=7 ProcVersionSignature: Ubuntu 4.13.0-45.50~16.04.1-generic 4.13.16 RelatedPackageVersions: linux-restricted-modules-4.13.0-45-generic N/A linux-backports-modules-4.13.0-45-generic N/A linux-firmware 1.157.19 Tags: xenial xenial Uname: Linux 4.13.0-45-generic x86_64 UnreportableReason: The report belongs to a package that is not installed. UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lp lpadmin plugdev sambashare sudo vboxusers _MarkForUpload: False dmi.bios.date: 05/26/2016 dmi.bios.vendor: American Megatrends Inc. dmi.bios.version: 5.11 dmi.board.asset.tag: Tag 12345 dmi.board.name: N350DW dmi.board.vendor: CLEVO dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: No Enclosure dmi.chassis.version: N/A dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr5.11:bd05/26/2016:svnPCSpecialistLimited:pnN350DW:pvrNotApplicable:rvnCLEVO:rnN350DW:rvrNotApplicable:cvnNoEnclosure:ct10:cvrN/A: dmi.product.family: Not Applicable dmi.product.name: N350DW dmi.product.version: Not Applicable dmi.sys.vendor: PC Specialist Limited To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1776642/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
