[Bug 215003] New: apple_gmux fails to initialize and iGPU unclaimed on MacBook Pro 16" 2019

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=215003

            Bug ID: 215003
           Summary: apple_gmux fails to initialize and iGPU unclaimed on
                    MacBook Pro 16" 2019
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.14.y
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri at kernel-bugs.osdl.org
          Reporter: dreifachstein at gmail.com
        Regression: No

MBP2019 can be tricked into booting with the iGPU enabled
(https://github.com/0xbb/apple_set_os.efi) but i915 does not claim the iGPU
after booting.


I have tracked down the direct cause but do not how to fix it.

When booting with the iGPU enabled `apple_gmux_present` returns true because 
GMUX_ACPI_HID ("APP000B") is present in the ACPI tables. 
Because apple_gmux fails to initialize with "Failed to find gmux I/O resource"
and never registers with vgaswitcheroo the i915 probe routine always bails out
after `vga_switcheroo_client_probe_defer` lefting the device unclaimed.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.