$ git bisect log git bisect start # old: [f8394f232b1eab649ce2df5c5f15b0e528c92091] Linux 5.10-rc3 git bisect old f8394f232b1eab649ce2df5c5f15b0e528c92091 # new: [c0f98d2f8b076bf3e3183aa547395f919c943a14] Merge tag 'drm-misc-next-2020-11-05' of git://anongit.freedesktop.org/drm/drm-misc into drm-next git bisect new c0f98d2f8b076bf3e3183aa547395f919c943a14 # old: [3cea11cd5e3b00d91caf0b4730194039b45c5891] Linux 5.10-rc2 git bisect old 3cea11cd5e3b00d91caf0b4730194039b45c5891 # old: [6a6e5988a2657cd0c91f6f1a3e7d194599248b6d] drm/ttm: replace last move_notify with delete_mem_notify git bisect old 6a6e5988a2657cd0c91f6f1a3e7d194599248b6d # new: [f566fdcd6cc49a9d5b5d782f56e3e7cb243f01b8] drm/i915: Force VT'd workarounds when running as a guest OS git bisect new f566fdcd6cc49a9d5b5d782f56e3e7cb243f01b8 # old: [b50b7991b739c6d63658e3324a01eaa0fafe8b7f] drm/i915/dg1: add more PCI ids git bisect old b50b7991b739c6d63658e3324a01eaa0fafe8b7f # old: [0a5991f5d022235ba085001e2a3926f83a0aed1b] drm/i915: Simplify the link training functions git bisect old 0a5991f5d022235ba085001e2a3926f83a0aed1b # new: [0dac17af0ab4e55b6b18a762141f255d3eea1e37] drm/i915/dg1: Enable DPLL for DG1 git bisect new 0dac17af0ab4e55b6b18a762141f255d3eea1e37 # new: [055f8458d95a38c20e8360634255f684378179eb] drm/i915: Force DPCD backlight mode for BOE 2270 panel git bisect new 055f8458d95a38c20e8360634255f684378179eb # old: [7b2a4ab8b0ef2a6dbec0b15d2cabf5a9e7acdf4c] drm/i915: Switch to LTTPR transparent mode link training git bisect old 7b2a4ab8b0ef2a6dbec0b15d2cabf5a9e7acdf4c # new: [b30edfd8d0b4b22f9c17c208064b39a3d93e6971] drm/i915: Switch to LTTPR non-transparent mode link training git bisect new b30edfd8d0b4b22f9c17c208064b39a3d93e6971 # first new commit: [b30edfd8d0b4b22f9c17c208064b39a3d93e6971] drm/i915: Switch to LTTPR non-transparent mode link training
So this, https://patchwork.freedesktop.org/series/82449/ , patchset is the fix. * b30edfd8d0b4 drm/i915: Switch to LTTPR non-transparent mode link training * 7b2a4ab8b0ef drm/i915: Switch to LTTPR transparent mode link training * 9782f52ab5d6 drm/dp: Add LTTPR helpers * c43027a9a375 drm/i915: Factor out a helper to disable the DPCD training pattern * 0a5991f5d022 drm/i915: Simplify the link training functions * 6777a855d66d drm/i915: Fix DP link training pattern mask These six commits are required with additional dependency to https://patchwork.freedesktop.org/series/76993/ as well. Verified by cherry-picking these to a Ubuntu-5.10-5.10.0-3.4 kernel. -- 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/1903969 Title: failed to boot to GUI: i915 0000:00:02.0: [drm] *ERROR* Link Training Unsuccessful Status in HWE Next: New Status in linux package in Ubuntu: New Bug description: [Summary] When the monitor ONLY is connected to the WD19 (DP port) and WD19 is connected to the type c port than boot the machine, the monitor shows no video output after loaded i915. [Reproduce Steps] 1. connect power cable of WD19 2. connect DP cable from monitor to WD19 3. connect power cable to target system. 4. connect type c cable from WD19 to target system 5. boot up [Results] Expected: video output as there is only one monitor connected. Actual: No video output. ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: linux-image-5.6.0-1033-oem 5.6.0-1033.35 ProcVersionSignature: Ubuntu 5.6.0-1033.35-oem 5.6.19 Uname: Linux 5.6.0-1033-oem x86_64 ApportVersion: 2.20.11-0ubuntu27.11 Architecture: amd64 CasperMD5CheckResult: skip Date: Thu Nov 12 05:11:11 2020 DistributionChannelDescriptor: # This is the distribution channel descriptor for the OEM CDs # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-focal-amd64-20200502-85+fossa-metapod+X40 InstallationDate: Installed on 2020-11-03 (9 days ago) InstallationMedia: Ubuntu 20.04 "Focal" - Build amd64 LIVE Binary 20200502-05:58 SourcePackage: linux-signed-oem-5.6 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/hwe-next/+bug/1903969/+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
