** Description changed: - On some setups, while the monitor and the gpu support display modes with - pixel clocks of up to 600MHz, the link encoder might not. This prevents - YCbCr444 and RGB encoding for 4k60Hz, but YCbCr420 encoding might still be - possible. However, which color mode is used is decided before the link - encoder capabilities are checked. This patch fixes the problem by retrying - to find a display mode with YCbCr420 enforced and using it, if it is - valid. + SRU Justification: + + Impact: On some setups, while the monitor and the gpu support display modes with pixel clocks of up to 600MHz, the link encoder might not. This prevents YCbCr444 and RGB encoding for 4k60Hz, but YCbCr420 encoding might still be possible. However, which color mode is used is decided before the link encoder capabilities are checked, causing the check to fail and discarding 4k60Hz from the list of possible display modes. + Fix: This patch fixes the problem by retrying to find a display mode with YCbCr420 enforced and using it, if it is valid. + Testcase: Tested on an Clevo NL50RU. General: Find a PC with a current AMD Radeon GPU, but only a hdmi 1.4 output (e.g. current Clevo laptops with AMD APU's). Connect a 4k@60Hz display supporting YCbCr420 encoding to the hdmi port. Without the patch the maximum that can be set via xrandr is 3840 × 2160 30Hz. With the Patch 3840 × 2160 60Hz can be selected which will use YCbCr420 automatically. Patch already got accepted upstream for linux-next: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux- next.git/commit/?id=14e4a095b29fd290a9b80f6e553adcfcf01672d1 and applies without modifications to ubuntu-focal/hwe-5.8 Commit-hash: 14e4a095b29fd290a9b80f6e553adcfcf01672d1 - --- + --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: - USER PID ACCESS COMMAND - /dev/snd/controlC1: test 2903 F.... pulseaudio - /dev/snd/controlC0: test 2903 F.... pulseaudio + USER PID ACCESS COMMAND + /dev/snd/controlC1: test 2903 F.... pulseaudio + /dev/snd/controlC0: test 2903 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: Budgie:GNOME DistroRelease: Ubuntu 20.04 MachineType: TUXEDO TUXEDO Aura 15 Gen1 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-48-generic root=UUID=59a028a1-0764-418a-951d-515f1839bd7f ro ignore_loglevel quiet splash i8042.reset i8042.nomux i8042.nopnp i8042.noloop xhci_hcd.quirks=1073741824 vt.handoff=7 ProcVersionSignature: Ubuntu 5.8.0-48.54~20.04.1-generic 5.8.18 RelatedPackageVersions: - linux-restricted-modules-5.8.0-48-generic N/A - linux-backports-modules-5.8.0-48-generic N/A - linux-firmware 1.187.9 + linux-restricted-modules-5.8.0-48-generic N/A + linux-backports-modules-5.8.0-48-generic N/A + linux-firmware 1.187.9 Tags: focal Uname: Linux 5.8.0-48-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/13/2020 dmi.bios.release: 7.3 dmi.bios.vendor: INSYDE Corp. dmi.bios.version: 1.07.03RTR2 dmi.board.asset.tag: Tag 12345 dmi.board.name: AURA1501 dmi.board.vendor: TUXEDO Computers dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnINSYDECorp.:bvr1.07.03RTR2:bd11/13/2020:br7.3:svnTUXEDO:pnTUXEDOAura15Gen1:pvrNotApplicable:rvnTUXEDOComputers:rnAURA1501:rvrNotApplicable:cvnNotebook:ct10:cvrN/A: dmi.product.family: Not Applicable dmi.product.name: TUXEDO Aura 15 Gen1 dmi.product.sku: AURA1501 dmi.product.version: Not Applicable dmi.sys.vendor: TUXEDO
** Description changed: SRU Justification: - Impact: On some setups, while the monitor and the gpu support display modes with pixel clocks of up to 600MHz, the link encoder might not. This prevents YCbCr444 and RGB encoding for 4k60Hz, but YCbCr420 encoding might still be possible. However, which color mode is used is decided before the link encoder capabilities are checked, causing the check to fail and discarding 4k60Hz from the list of possible display modes. - Fix: This patch fixes the problem by retrying to find a display mode with YCbCr420 enforced and using it, if it is valid. - Testcase: Tested on an Clevo NL50RU. General: Find a PC with a current AMD Radeon GPU, but only a hdmi 1.4 output (e.g. current Clevo laptops with AMD APU's). Connect a 4k@60Hz display supporting YCbCr420 encoding to the hdmi port. Without the patch the maximum that can be set via xrandr is 3840 × 2160 30Hz. With the Patch 3840 × 2160 60Hz can be selected which will use YCbCr420 automatically. + Impact: + On some setups, while the monitor and the gpu support display modes with pixel clocks of up to 600MHz, the link encoder might not. This prevents YCbCr444 and RGB encoding for 4k60Hz, but YCbCr420 encoding might still be possible. However, which color mode is used is decided before the link encoder capabilities are checked, causing the check to fail and discarding 4k60Hz from the list of possible display modes. + + Fix: + This patch fixes the problem by retrying to find a display mode with YCbCr420 enforced and using it, if it is valid. + + Testcase: + Tested on an Clevo NL50RU. General: Find a PC with a current AMD Radeon GPU, but only a hdmi 1.4 output (e.g. current Clevo laptops with AMD APU's). Connect a 4k@60Hz display supporting YCbCr420 encoding to the hdmi port. Without the patch the maximum that can be set via xrandr is 3840 × 2160 30Hz. With the Patch 3840 × 2160 60Hz can be selected which will use YCbCr420 automatically. Patch already got accepted upstream for linux-next: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux- next.git/commit/?id=14e4a095b29fd290a9b80f6e553adcfcf01672d1 and applies without modifications to ubuntu-focal/hwe-5.8 Commit-hash: 14e4a095b29fd290a9b80f6e553adcfcf01672d1 --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: test 2903 F.... pulseaudio /dev/snd/controlC0: test 2903 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: Budgie:GNOME DistroRelease: Ubuntu 20.04 MachineType: TUXEDO TUXEDO Aura 15 Gen1 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-48-generic root=UUID=59a028a1-0764-418a-951d-515f1839bd7f ro ignore_loglevel quiet splash i8042.reset i8042.nomux i8042.nopnp i8042.noloop xhci_hcd.quirks=1073741824 vt.handoff=7 ProcVersionSignature: Ubuntu 5.8.0-48.54~20.04.1-generic 5.8.18 RelatedPackageVersions: linux-restricted-modules-5.8.0-48-generic N/A linux-backports-modules-5.8.0-48-generic N/A linux-firmware 1.187.9 Tags: focal Uname: Linux 5.8.0-48-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/13/2020 dmi.bios.release: 7.3 dmi.bios.vendor: INSYDE Corp. dmi.bios.version: 1.07.03RTR2 dmi.board.asset.tag: Tag 12345 dmi.board.name: AURA1501 dmi.board.vendor: TUXEDO Computers dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnINSYDECorp.:bvr1.07.03RTR2:bd11/13/2020:br7.3:svnTUXEDO:pnTUXEDOAura15Gen1:pvrNotApplicable:rvnTUXEDOComputers:rnAURA1501:rvrNotApplicable:cvnNotebook:ct10:cvrN/A: dmi.product.family: Not Applicable dmi.product.name: TUXEDO Aura 15 Gen1 dmi.product.sku: AURA1501 dmi.product.version: Not Applicable dmi.sys.vendor: TUXEDO -- 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/1922754 Title: Make AMD gpus choose YCbCr420 encoding automatically when required for 4k 60Hz output Status in linux package in Ubuntu: Confirmed Bug description: SRU Justification: Impact: On some setups, while the monitor and the gpu support display modes with pixel clocks of up to 600MHz, the link encoder might not. This prevents YCbCr444 and RGB encoding for 4k60Hz, but YCbCr420 encoding might still be possible. However, which color mode is used is decided before the link encoder capabilities are checked, causing the check to fail and discarding 4k60Hz from the list of possible display modes. Fix: This patch fixes the problem by retrying to find a display mode with YCbCr420 enforced and using it, if it is valid. Testcase: Tested on an Clevo NL50RU. General: Find a PC with a current AMD Radeon GPU, but only a hdmi 1.4 output (e.g. current Clevo laptops with AMD APU's). Connect a 4k@60Hz display supporting YCbCr420 encoding to the hdmi port. Without the patch the maximum that can be set via xrandr is 3840 × 2160 30Hz. With the Patch 3840 × 2160 60Hz can be selected which will use YCbCr420 automatically. Patch already got accepted upstream for linux-next: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux- next.git/commit/?id=14e4a095b29fd290a9b80f6e553adcfcf01672d1 and applies without modifications to ubuntu-focal/hwe-5.8 Commit-hash: 14e4a095b29fd290a9b80f6e553adcfcf01672d1 --- ProblemType: Bug ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: test 2903 F.... pulseaudio /dev/snd/controlC0: test 2903 F.... pulseaudio CasperMD5CheckResult: skip CurrentDesktop: Budgie:GNOME DistroRelease: Ubuntu 20.04 MachineType: TUXEDO TUXEDO Aura 15 Gen1 Package: linux (not installed) ProcFB: 0 amdgpudrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.8.0-48-generic root=UUID=59a028a1-0764-418a-951d-515f1839bd7f ro ignore_loglevel quiet splash i8042.reset i8042.nomux i8042.nopnp i8042.noloop xhci_hcd.quirks=1073741824 vt.handoff=7 ProcVersionSignature: Ubuntu 5.8.0-48.54~20.04.1-generic 5.8.18 RelatedPackageVersions: linux-restricted-modules-5.8.0-48-generic N/A linux-backports-modules-5.8.0-48-generic N/A linux-firmware 1.187.9 Tags: focal Uname: Linux 5.8.0-48-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 11/13/2020 dmi.bios.release: 7.3 dmi.bios.vendor: INSYDE Corp. dmi.bios.version: 1.07.03RTR2 dmi.board.asset.tag: Tag 12345 dmi.board.name: AURA1501 dmi.board.vendor: TUXEDO Computers dmi.board.version: Not Applicable dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Notebook dmi.chassis.version: N/A dmi.modalias: dmi:bvnINSYDECorp.:bvr1.07.03RTR2:bd11/13/2020:br7.3:svnTUXEDO:pnTUXEDOAura15Gen1:pvrNotApplicable:rvnTUXEDOComputers:rnAURA1501:rvrNotApplicable:cvnNotebook:ct10:cvrN/A: dmi.product.family: Not Applicable dmi.product.name: TUXEDO Aura 15 Gen1 dmi.product.sku: AURA1501 dmi.product.version: Not Applicable dmi.sys.vendor: TUXEDO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1922754/+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
