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@xxxxxxxxxxxxxxxxxxxx Reporter: dreifachstein@xxxxxxxxx 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.
