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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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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