Description:
udev rule to force power level high is ignored

https://wiki.archlinux.org/title/AMDGPU#Screen_artifacts_and_frequency_problem

...you may create a udev rule:

/etc/udev/rules.d/30-amdgpu-pm.rules

KERNEL=="card0", SUBSYSTEM=="drm", DRIVERS=="amdgpu", ATTR{device/power_dpm_force_performance_level}="high"


Additional info:
* core/systemd 247.3-1 [installed: 249.4-2] (both kernel 5.14.10, 5.10.70LTS - Manjaro)
* udevadm info -a -n '/dev/dri/card0'

Udevadm info starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

looking at device '/devices/pci0000:00/0000:00:02.1/0000:01:00.0/drm/card0':
KERNEL=="card0"
SUBSYSTEM=="drm"
DRIVER==""
ATTR{power/control}=="auto"
ATTR{power/runtime_active_time}=="0"
ATTR{power/runtime_status}=="unsupported"
ATTR{power/runtime_suspended_time}=="0"

looking at parent device '/devices/pci0000:00/0000:00:02.1/0000:01:00.0':
KERNELS=="0000:01:00.0"
SUBSYSTEMS=="pci"
DRIVERS=="amdgpu"
ATTRS{ari_enabled}=="0"
ATTRS{boot_vga}=="1"
ATTRS{broken_parity_status}=="0"
ATTRS{class}=="0x030000"
ATTRS{consistent_dma_mask_bits}=="40"
ATTRS{current_link_speed}=="8.0 GT/s PCIe"
ATTRS{current_link_width}=="16"
ATTRS{d3cold_allowed}=="1"
ATTRS{device}=="0x6938"
ATTRS{dma_mask_bits}=="40"
ATTRS{driver_override}=="(null)"
ATTRS{enable}=="1"
ATTRS{fw_version/asd_fw_version}=="0x00000000"
ATTRS{fw_version/ce_fw_version}=="0x00000089"
ATTRS{fw_version/dmcu_fw_version}=="0x00000000"
ATTRS{fw_version/mc_fw_version}=="0x00c49200"
ATTRS{fw_version/me_fw_version}=="0x000000a4"
ATTRS{fw_version/mec2_fw_version}=="0x000002ce"
ATTRS{fw_version/mec_fw_version}=="0x000002ce"
ATTRS{fw_version/pfp_fw_version}=="0x000000f3"
ATTRS{fw_version/rlc_fw_version}=="0x000000c8"
ATTRS{fw_version/rlc_srlc_fw_version}=="0x00000000"
ATTRS{fw_version/rlc_srlg_fw_version}=="0x00000000"
ATTRS{fw_version/rlc_srls_fw_version}=="0x00000000"
ATTRS{fw_version/sdma2_fw_version}=="0x00000047"
ATTRS{fw_version/sdma_fw_version}=="0x00000047"
ATTRS{fw_version/smc_fw_version}=="0x00110700"
ATTRS{fw_version/sos_fw_version}=="0x00000000"
ATTRS{fw_version/ta_ras_fw_version}=="0x00000000"
ATTRS{fw_version/ta_xgmi_fw_version}=="0x00000000"
ATTRS{fw_version/uvd_fw_version}=="0x01440a00"
ATTRS{fw_version/vce_fw_version}=="0x34080300"
ATTRS{fw_version/vcn_fw_version}=="0x00000000"
ATTRS{gpu_busy_percent}=="0"
ATTRS{irq}=="50"
ATTRS{link/l0s_aspm}=="0"
ATTRS{link/l1_aspm}=="0"
ATTRS{local_cpulist}=="0-3"
ATTRS{local_cpus}=="f"
ATTRS{max_link_speed}=="8.0 GT/s PCIe"
ATTRS{max_link_width}=="16"
ATTRS{mem_busy_percent}=="0"
ATTRS{mem_info_gtt_total}=="4294967296"
ATTRS{mem_info_gtt_used}=="38268928"
ATTRS{mem_info_preempt_used}=="0"
ATTRS{mem_info_vis_vram_total}=="268435456"
ATTRS{mem_info_vis_vram_used}=="65998848"
ATTRS{mem_info_vram_total}=="4294967296"
ATTRS{mem_info_vram_used}=="502460416"
ATTRS{mem_info_vram_vendor}=="unknown"
ATTRS{msi_bus}=="1"
ATTRS{msi_irqs/50}=="msi"
ATTRS{numa_node}=="-1"
ATTRS{pcie_bw}=="1595 208 256"
ATTRS{pcie_replay_count}=="0"
ATTRS{power/autosuspend_delay_ms}=="5000"
ATTRS{power/control}=="on"
ATTRS{power/runtime_active_time}=="627884"
ATTRS{power/runtime_status}=="active"
ATTRS{power/runtime_suspended_time}=="0"
ATTRS{power/wakeup}=="disabled"
ATTRS{power/wakeup_abort_count}==""
ATTRS{power/wakeup_active}==""
ATTRS{power/wakeup_active_count}==""
ATTRS{power/wakeup_count}==""
ATTRS{power/wakeup_expire_count}==""
ATTRS{power/wakeup_last_time_ms}==""
ATTRS{power/wakeup_max_time_ms}==""
ATTRS{power/wakeup_total_time_ms}==""
ATTRS{power_dpm_force_performance_level}=="high"
ATTRS{power_dpm_state}=="performance"
ATTRS{power_state}=="D0"
ATTRS{pp_cur_state}=="1"
ATTRS{pp_force_state}==""
ATTRS{pp_mclk_od}=="0"
ATTRS{pp_sclk_od}=="0"
ATTRS{product_name}==""
ATTRS{product_number}==""
ATTRS{revision}=="0xf1"
ATTRS{serial_number}==""
ATTRS{subsystem_device}=="0xe308"
ATTRS{subsystem_vendor}=="0x174b"
ATTRS{thermal_throttling_logging}=="0000:01:00.0: thermal throttling logging enabled, with interval 60 seconds"
ATTRS{vbios_version}=="113-4E3081U-X58"
ATTRS{vendor}=="0x1002"

looking at parent device '/devices/pci0000:00/0000:00:02.1':
KERNELS=="0000:00:02.1"
SUBSYSTEMS=="pci"
DRIVERS=="pcieport"
ATTRS{ari_enabled}=="0"
ATTRS{broken_parity_status}=="0"
ATTRS{class}=="0x060400"
ATTRS{consistent_dma_mask_bits}=="32"
ATTRS{current_link_speed}=="8.0 GT/s PCIe"
ATTRS{current_link_width}=="16"
ATTRS{d3cold_allowed}=="1"
ATTRS{device}=="0x1425"
ATTRS{dma_mask_bits}=="32"
ATTRS{driver_override}=="(null)"
ATTRS{enable}=="1"
ATTRS{irq}=="25"
ATTRS{local_cpulist}=="0-3"
ATTRS{local_cpus}=="f"
ATTRS{max_link_speed}=="8.0 GT/s PCIe"
ATTRS{max_link_width}=="16"
ATTRS{msi_bus}=="1"
ATTRS{msi_irqs/25}=="msi"
ATTRS{numa_node}=="-1"
ATTRS{power/autosuspend_delay_ms}=="100"
ATTRS{power/control}=="on"
ATTRS{power/runtime_active_time}=="628902"
ATTRS{power/runtime_status}=="active"
ATTRS{power/runtime_suspended_time}=="0"
ATTRS{power/wakeup}=="disabled"
ATTRS{power/wakeup_abort_count}==""
ATTRS{power/wakeup_active}==""
ATTRS{power/wakeup_active_count}==""
ATTRS{power/wakeup_count}==""
ATTRS{power/wakeup_expire_count}==""
ATTRS{power/wakeup_last_time_ms}==""
ATTRS{power/wakeup_max_time_ms}==""
ATTRS{power/wakeup_total_time_ms}==""
ATTRS{power_state}=="D0"
ATTRS{revision}=="0x00"
ATTRS{secondary_bus_number}=="1"
ATTRS{subordinate_bus_number}=="1"
ATTRS{subsystem_device}=="0x1234"
ATTRS{subsystem_vendor}=="0x1022"
ATTRS{vendor}=="0x1022"

looking at parent device '/devices/pci0000:00':
KERNELS=="pci0000:00"
SUBSYSTEMS==""
DRIVERS==""
ATTRS{power/control}=="auto"
ATTRS{power/runtime_active_time}=="0"
ATTRS{power/runtime_status}=="unsupported"
ATTRS{power/runtime_suspended_time}=="0"
ATTRS{waiting_for_supplier}=="0"

* suspect udev rule needs update as shown (still doesn't work):
KERNEL=="card0", SUBSYSTEM=="drm", DRIVERS=="amdgpu", ATTRS{power_dpm_force_performance_level}=="high"

* link to upstream bug report, if any: no

Steps to reproduce:
create udev rule, check to see if setting took with commands (interchangeable):

udevadm info -a -n '/dev/dri/card0' | grep -Pi 'power_dpm'
udevadm info --attribute-walk /sys/class/drm/card0 | grep -Pi 'power_dpm'