[PATCH][SRU][Bionic] HP workstations cannot output to external monitors by dGPU
alex.hung at canonical.com
Mon Jan 7 16:13:20 UTC 2019
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.
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(+)
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