You have been subscribed to a public bug: Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993311] [drm:drm_add_edid_modes.part.22 [drm]] HDMI: DVI dual 0, max TMDS clock 300000 kHz Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993315] nouveau 0000:01:00.0: DRM: native mode from largest: 1920x1080@60 Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993342] [drm:drm_mode_debug_printmodeline [drm]] Modeline 69:"3840x2160" 30 297000 3840 4016 4104 4400 2160 2168 2178 2250 0x48 0x5 Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993348] [drm:drm_mode_prune_invalid [drm]] Not using 3840x2160 mode: CLOCK_HIGH Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993353] [drm:drm_mode_debug_printmodeline [drm]] Modeline 73:"2560x1440" 60 241500 2560 2608 2640 2720 1440 1443 1448 1481 0x40 0x9 Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993358] [drm:drm_mode_prune_invalid [drm]] Not using 2560x1440 mode: CLOCK_HIGH Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993363] [drm:drm_mode_debug_printmodeline [drm]] Modeline 104:"3840x2160" 25 297000 3840 4896 4984 5280 2160 2168 2178 2250 0x40 0x5 Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993368] [drm:drm_mode_prune_invalid [drm]] Not using 3840x2160 mode: CLOCK_HIGH Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993373] [drm:drm_mode_debug_printmodeline [drm]] Modeline 105:"3840x2160" 24 297000 3840 5116 5204 5500 2160 2168 2178 2250 0x40 0x5 Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993378] [drm:drm_mode_prune_invalid [drm]] Not using 3840x2160 mode: CLOCK_HIGH Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993383] [drm:drm_mode_debug_printmodeline [drm]] Modeline 106:"3840x2160" 30 296703 3840 4016 4104 4400 2160 2168 2178 2250 0x40 0x5 Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993387] [drm:drm_mode_prune_invalid [drm]] Not using 3840x2160 mode: CLOCK_HIGH Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993392] [drm:drm_mode_debug_printmodeline [drm]] Modeline 116:"3840x2160" 24 296703 3840 5116 5204 5500 2160 2168 2178 2250 0x40 0x5 Jan 10 18:56:03 frode-MacBookPro kernel: [ 4.993397] [drm:drm_mode_prune_invalid [drm]] Not using 3840x2160 mode: CLOCK_HIGH
However it is perfectly valid to use higher pixel clock on some graphic cards. This patch will allow the end-user to adjust the pixel clock with the hdmimhz kernel parameter until the detection code gets good enough: https://github.com/torvalds/linux/commit/1a0c96c075bb4517d4ce4fb6750ee0a3cf38714c This page contains a lot of useful information and lead me to a sollution to my problem: https://www.elstel.org/software/hunt-for-4K-UHD-2160p.html.en I think this is worthy of consideration for backport to the Xenial kernel as not being able to use the most recent LTS version of Ubuntu Desktop with current hardware is a drag. --- ApportVersion: 2.20.1-0ubuntu2.4 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: frode 2797 F.... pulseaudio /dev/snd/controlC0: frode 2797 F.... pulseaudio CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 HibernationDevice: RESUME=UUID=ae0b4ef2-57b4-4ab5-ac55-be113c10f1d1 InstallationDate: Installed on 2017-01-08 (2 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) MachineType: Apple Inc. MacBookPro10,1 NonfreeKernelModules: wl Package: linux-image-extra-4.4.0-59-generic 4.4.0-59.80 PackageArchitecture: amd64 ProcFB: 0 inteldrmfb 1 nouveaufb ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-59-generic.efi.signed root=/dev/mapper/ubuntu--vg-root ro quiet splash hdmimhz=297 vt.handoff=7 ProcVersionSignature: Ubuntu 4.4.0-59.80-generic 4.4.35 RelatedPackageVersions: linux-restricted-modules-4.4.0-59-generic N/A linux-backports-modules-4.4.0-59-generic N/A linux-firmware 1.157.6 Tags: xenial Uname: Linux 4.4.0-59-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo _MarkForUpload: True dmi.bios.date: 10/20/2016 dmi.bios.vendor: Apple Inc. dmi.bios.version: MBP101.88Z.00EE.B0B.1610201442 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-C3EC7CD22292981F dmi.board.vendor: Apple Inc. dmi.board.version: MacBookPro10,1 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-C3EC7CD22292981F dmi.modalias: dmi:bvnAppleInc.:bvrMBP101.88Z.00EE.B0B.1610201442:bd10/20/2016:svnAppleInc.:pnMacBookPro10,1:pvr1.0:rvnAppleInc.:rnMac-C3EC7CD22292981F:rvrMacBookPro10,1:cvnAppleInc.:ct10:cvrMac-C3EC7CD22292981F: dmi.product.name: MacBookPro10,1 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. ** Affects: linux (Ubuntu) Importance: Undecided Status: Confirmed ** Tags: apport-collected xenial -- nouveau driver being too conservative about HDMI pixel clock, barring usage of native resolution on 4K displays over HDMI https://bugs.launchpad.net/bugs/1655421 You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. -- 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
