[SRU][OEM-OSP1-B][PATCH v2 0/1] UBUNTU: SAUCE: drm/i915: Fix detection for a CMP-V PCH

You-Sheng Yang vicamo.yang at canonical.com
Wed Nov 13 11:23:02 UTC 2019

From: You-Sheng Yang <vicamo at gmail.com>

BugLink: https://bugs.launchpad.net/bugs/1852386

Bug 1849278 introduced a regression on some Comet Lake platforms that
device may have no video output on HDMI port.

A currently in-review patch
https://patchwork.freedesktop.org/patch/340416 should be applied to
correct PCH's identity and restore HDMI output.

[Test Case]
1. Apply the patches to oem-osp1 kernel >= 1026 or Eoan/Focal generic
2. Boot affected platforms with HDMI cable connected to an external
3. Check if the monitor lights up when GDM service is started.

This was verified in to victim platforms.

[Regression Risk]
Low. This should affects only systems with matching PCH hw that is
currently affected by the regression to be fixed.

v2: update cover letter title to include target series

Imre Deak (1):
  UBUNTU: SAUCE: drm/i915: Fix detection for a CMP-V PCH

 drivers/gpu/drm/i915/i915_drv.c | 6 +++++-
 drivers/gpu/drm/i915/i915_drv.h | 2 +-
 2 files changed, 6 insertions(+), 2 deletions(-)


More information about the kernel-team mailing list