[SRU][N:linux][PATCH 0/2] Fix ARL-U/H suspend issues

Thibault Ferrante thibault.ferrante at canonical.com
Wed Aug 6 23:02:48 UTC 2025


BugLink: https://bugs.launchpad.net/bugs/2112469

[ Impact ]

 * Multiple issues are noticed when validating Arrow Lake hardware after suspend.
  - An ethernet interface cannot be up after suspend - LP: #2111232
  - Found Network Controller configurations differences while running suspend stress tests - LP: #2110284
  - Found DRM Device configurations differences while running suspend stress test - LP: #2110284

[ Fix ]

Fix has been pointed out by intel by integrating https://patchwork.kernel.org/project/linux-pm/patch/20250207225615.401235-7-xi.pardee@linux.intel.com/

It has been integrated in 6.15 :
- bd820906ea9d platform/x86/intel/pmc: Add Arrow Lake U/H support to intel_pmc_core driver

It has been backported to avoid bringing a large refactoring.

[ Test Plan ]

 * Use targeted hardware to go into S3 and check for all network interfaces working.

[ Where problems could occur ]

 * Regression in other intel hardware suspend management.

Todd Brandt (1):
  platform/x86/intel/pmc: Fix Arrow Lake U/H NPU PCI ID

Xi Pardee (1):
  platform/x86/intel/pmc: Add Arrow Lake U/H support to intel_pmc_core
    driver

 drivers/platform/x86/intel/pmc/arl.c  | 59 +++++++++++++++++++++++++++
 drivers/platform/x86/intel/pmc/core.c |  1 +
 drivers/platform/x86/intel/pmc/core.h |  1 +
 3 files changed, 61 insertions(+)

-- 
2.48.1




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