group.of.nepali.translators team mailing list archive

[Tim Gardner <tim.gardner@xxxxxxxxxxxxx>]

https://lists.ubuntu.com/archives/kernel-team/2017-January/081801.html

** Package changed: linux-lts-xenial (Ubuntu) => linux (Ubuntu)

** Also affects: linux (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: linux (Ubuntu Zesty)
   Importance: Undecided
       Status: Confirmed

** Also affects: linux (Ubuntu Yakkety)
   Importance: Undecided
       Status: New

** Changed in: linux (Ubuntu Xenial)
       Status: New => In Progress

** Changed in: linux (Ubuntu Xenial)
     Assignee: (unassigned) => Frode Nordahl (fnordahl)

** Changed in: linux (Ubuntu Yakkety)
       Status: New => In Progress

** Changed in: linux (Ubuntu Yakkety)
     Assignee: (unassigned) => Frode Nordahl (fnordahl)

** Changed in: linux (Ubuntu Zesty)
       Status: Confirmed => Fix Released

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Matching subscriptions: Ubuntu 16.04 Bugs
https://bugs.launchpad.net/bugs/1655421

Title:
  nouveau driver being too conservative about HDMI pixel clock, barring
  usage of native resolution on 4K displays over HDMI

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  In Progress
Status in linux source package in Yakkety:
  In Progress
Status in linux source package in Zesty:
  Fix Released

Bug description:
  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.

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