Dell XPS 13 9300 mirror mode doesn't work sometimes with WD19TB

Bug #1877013 reported by AceLan Kao on 2020-05-06
8
This bug affects 1 person
Affects Status Importance Assigned to Milestone
HWE Next
Undecided
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linux (Ubuntu)
Undecided
Unassigned
Focal
Undecided
AceLan Kao

Bug Description

[Impact]
Connect HDMI monitor on WD19TB dock and connect WD19TB to Dell XPS 13 9300, toggling the display mode to mirror sometimes got a blank screen on external monitor.

[Fix]
After bisect kernel and found below commit(from v5.7-rc2) improves the stability
bcad588dea53 drm/i915/perf: Do not clear pollin for small user read buffers

[Test]
Verified on Dell XPS 13 9300 with WD19TB docking station, the fail rate becomes from 1/2 to 1/30

[Regression Potential]
Low, this commit has been CC'd to stable, so we will have this soon.

[Misc]
OEM-5.6 has this commit from v5.6.6 stable update

CVE References

AceLan Kao (acelankao) on 2020-05-06
Changed in linux (Ubuntu Focal):
assignee: nobody → AceLan Kao (acelankao)
Changed in linux-oem-5.6 (Ubuntu Focal):
assignee: nobody → AceLan Kao (acelankao)
Changed in linux (Ubuntu):
status: New → Invalid
Changed in linux-oem-5.6 (Ubuntu):
status: New → Invalid
Changed in linux (Ubuntu Focal):
status: New → In Progress
Changed in linux-oem-5.6 (Ubuntu Focal):
status: New → In Progress
tags: added: oem-priority originate-from-1867863 somerville
no longer affects: linux-oem-5.6 (Ubuntu)
no longer affects: linux-oem-5.6 (Ubuntu Focal)
AceLan Kao (acelankao) on 2020-05-06
description: updated
Changed in linux (Ubuntu Focal):
status: In Progress → Fix Committed

This bug is awaiting verification that the kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-focal' to 'verification-done-focal'. If the problem still exists, change the tag 'verification-needed-focal' to 'verification-failed-focal'.

If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you!

tags: added: verification-needed-focal
AceLan Kao (acelankao) on 2020-05-27
tags: added: verification-done-focal
removed: verification-needed-focal
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package linux - 5.4.0-37.41

---------------
linux (5.4.0-37.41) focal; urgency=medium

  * CVE-2020-0543
    - SAUCE: x86/speculation/spectre_v2: Exclude Zhaoxin CPUs from SPECTRE_V2
    - SAUCE: x86/cpu: Add a steppings field to struct x86_cpu_id
    - SAUCE: x86/cpu: Add 'table' argument to cpu_matches()
    - SAUCE: x86/speculation: Add Special Register Buffer Data Sampling (SRBDS)
      mitigation
    - SAUCE: x86/speculation: Add SRBDS vulnerability and mitigation documentation
    - SAUCE: x86/speculation: Add Ivy Bridge to affected list

 -- Marcelo Henrique Cerri <email address hidden> Wed, 03 Jun 2020 11:24:23 -0300

Changed in linux (Ubuntu Focal):
status: Fix Committed → Fix Released

All autopkgtests for the newly accepted linux-oracle-5.4 (5.4.0-1019.19~18.04.1) for bionic have finished running.
The following regressions have been reported in tests triggered by the package:

zfs-linux/unknown (armhf)

Please visit the excuses page listed below and investigate the failures, proceeding afterwards as per the StableReleaseUpdates policy regarding autopkgtest regressions [1].

https://people.canonical.com/~ubuntu-archive/proposed-migration/bionic/update_excuses.html#linux-oracle-5.4

[1] https://wiki.ubuntu.com/StableReleaseUpdates#Autopkgtest_Regressions

Thank you!

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