[PATCH][SRU][Bionic] HP workstations cannot output to external monitors by dGPU

Alex Hung alex.hung at canonical.com
Mon Jan 7 16:13:20 UTC 2019

BugLink: http://bugs.launchpad.net/bugs/1810702


  HP mobile workstations are able to output to external monitors by dGPU in
  Windows with hybrid graphics, but this is not supported by Linux GPU
  drivers. As a result, this feature needs to be supported by BIOS but
  an _OSI string is required.

  BIOS added solutions with _OSI string "Linux-HPI-Hybrid-Graphics" to
  workaround, and a patch to report _OSI("Linux-HPI-Hybrid-Graphics")
  is required in Linux kernel.

  The patches are included in upstream and are cherry-picked from Linus's repo.

[Regression potential]
  No regression as all but targeted firmware will not use this _OSI string

Alex Hung (1):
  ACPI / OSI: Add OEM _OSI string to enable dGPU direct output

 drivers/acpi/osi.c | 7 +++++++
 1 file changed, 7 insertions(+)


More information about the kernel-team mailing list