apport information ** Tags added: apport-collected xenial
** Description changed: 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. + 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 ** Attachment added: "AlsaInfo.txt" https://bugs.launchpad.net/bugs/1776642/+attachment/5152139/+files/AlsaInfo.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1776642 Title: Temporal dithering started appearing on Intel HD 530 graphics To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1776642/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
