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domingo

Member

Registered: 2023-06-08

Posts: 10

AMD Radeon R9 M370X: "amdgpu: VERDE not supported in kfd"

I followed the instructions to switch from radeon to amdgpu in a MacbookPro11,5, but the display goes black on boot and only a secondary monitor works.
The errors at boot read:

$ journalctl -p 3 -xb

ACPI Error: Needed type [Reference], found [Integer] (____ptrval____) (2023033>
ACPI Error: AE_AML_OPERAND_TYPE, While resolving operands for [Store] (2023033>
ACPI Error: Aborting method \_PR.CPU0._PDC due to previous error (AE_AML_OPERA>
kfd kfd: amdgpu: VERDE  not supported in kfd

Not sure if those ACPI errors have anything to do with it.

Some people claim a similar problem solved by switching on the backlight manually via "echo 1 > /sys/class/backlight/amdgpu_bl0/brightness", but that file/folder does not exist in my system.
Others add kernel parameter "acpi_backlight=native", but this didn't make a change on me either.

Any idea how to diagnose this problem further?

$ sudo dmesg | grep amdgpu

[    0.000000] Command line: root=PARTLABEL=root rw mitigations=off amdgpu.ppfeaturemask=0xffffffff radeon.si_support=0 amdgpu.si_support=1 acpi_mask_gpe=0x17 acpi_backlight=native initrd=\initramfs-linux.img
[    0.045800] Kernel command line: root=PARTLABEL=root rw mitigations=off amdgpu.ppfeaturemask=0xffffffff radeon.si_support=0 amdgpu.si_support=1 acpi_mask_gpe=0x17 acpi_backlight=native initrd=\initramfs-linux.img
[    2.794568] [drm] amdgpu kernel modesetting enabled.
[    2.794789] amdgpu: CRAT table not found
[    2.794792] amdgpu: Virtual CRAT table created for CPU
[    2.794803] amdgpu: Topology: Add CPU node
[    2.795070] amdgpu 0000:01:00.0: amdgpu: Fetched VBIOS from VFCT
[    2.795073] amdgpu: ATOM BIOS: 113-C567A1-006
[    2.795080] kfd kfd: amdgpu: VERDE  not supported in kfd
[    2.824474] amdgpu 0000:01:00.0: vgaarb: deactivate vga console
[    2.824480] amdgpu 0000:01:00.0: amdgpu: Trusted Memory Zone (TMZ) feature not supported
[    2.825538] amdgpu 0000:01:00.0: amdgpu: VRAM: 2048M 0x0000000000000000 - 0x000000007FFFFFFF (2048M used)
[    2.825541] amdgpu 0000:01:00.0: amdgpu: GART: 1024M 0x000000FF00000000 - 0x000000FF3FFFFFFF
[    2.825738] [drm] amdgpu: 2048M of VRAM memory ready
[    2.825740] [drm] amdgpu: 7936M of GTT memory ready.
[    2.826277] amdgpu 0000:01:00.0: amdgpu: PCIE GART of 1024M enabled (table at 0x0000000001400000).
[    2.827201] [drm] amdgpu: dpm initialized
[    2.827428] [drm] amdgpu atom DIG backlight initialized
[    3.326407] amdgpu 0000:01:00.0: amdgpu: SE 1, SH per SE 2, CU per SH 5, active_cu_number 10
[    3.595307] [drm] Initialized amdgpu 3.52.0 20150101 for 0000:01:00.0 on minor 1
[    4.217019] fbcon: amdgpudrmfb (fb0) is primary device
[    5.284087] amdgpu 0000:01:00.0: [drm] fb0: amdgpudrmfb frame buffer device
[    7.019929] amdgpu 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
[   14.163785] amdgpu 0000:01:00.0: amdgpu: Disabling VM faults because of PRT request!

The discrete GPU was activated by spoof_osx_version in REFind.
$ glxinfo | grep "OpenGL renderer" && DRI_PRIME=1 glxinfo | grep "OpenGL renderer"

OpenGL renderer string: AMD Radeon R9 M370X (verde, LLVM 15.0.7, DRM 3.52, 6.4.12-arch1-1)
OpenGL renderer string: Mesa Intel(R) Iris(R) Pro Graphics P5200 (HSW GT3)

$ cat /proc/cmdline

root=PARTLABEL=root rw mitigations=off amdgpu.ppfeaturemask=0xffffffff radeon.si_support=0 amdgpu.si_support=1 acpi_mask_gpe=0x17 acpi_backlight=native initrd=\initramfs-linux.img

The radeon module is blacklisted and lsmod shows no signs of it.

Any suggestions will be gladly followed and highly appreciated!

domingo

Member

Registered: 2023-06-08

Posts: 10

Re: AMD Radeon R9 M370X: "amdgpu: VERDE not supported in kfd"

Sorted out.
Once the kernel parameter is set  "acpi_backlight=native", the kernel updated and a reboot, the file '/sys/class/backlight/amdgpu_bl1/brightness' comes to exist. Setting "echo 1 > /sys/class/backlight/amdgpu_bl1/brightness" then works and brings the display to life

Brightness control then didn't work, until I downgraded to kernel 6.1LTS-RT.

In summary, a combination of both reddit posts did it. May this serve someone else or myself in the future.