[SRU][Q:unstable][PATCH 0/1] Call trace occurs when unplugging a HDMI/DP/VGA cable on Dell platforms

En-Wei Wu en-wei.wu at canonical.com
Mon Aug 11 08:57:56 UTC 2025


BugLink: https://bugs.launchpad.net/bugs/2116908

[Impact]
On Dell platforms using either Linux 6.11.0-1021-oem or 6.14.0-1005-oem,
we observed call traces when unplugging a HDMI/DP/VGA cable from an
external monitor.

[Fix]
  Cherry-pick the following patch from the mainline:

  f354556e29f4 drm/amd/display: limit clear_update_flags to dcn32 and
  above

  Here is the reference for the full patchset:

  Link:
  https://lore.kernel.org/amd-gfx/20250710212941.630259-7-IVAN.LIPSKI@amd.com/

  [Test Plan]
  1. Boot into an Ubuntu OS
  2. Connect a HDMI/DP/VGA cable into an external monitor
  3. Check whether a call trace appears

  [Where problems could occur]
  This patch changes the behavior of AMD GPUs with DCN version lower
  than 3.2. It might cause regression on these GPUs.

Charlene Liu (1):
  drm/amd/display: limit clear_update_flags to dcn32 and above

 drivers/gpu/drm/amd/display/dc/core/dc.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

-- 
2.43.0




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