https://bugzilla.kernel.org/show_bug.cgi?id=220232
Bug ID: 220232
Summary: Title: RX 7900 XT/XTX DPM states incorrectly ordered -
idle state in wrong position
Product: Drivers
Version: 2.5
Hardware: AMD
OS: Linux
Status: NEW
Severity: high
Priority: P3
Component: Video(DRI - non Intel)
Assignee: drivers_video-...@kernel-bugs.osdl.org
Reporter: a.von.blument...@gmail.com
Regression: No
Description:
The GPU DPM states are incorrectly ordered on AMD RX 7900 XT/XTX. The lowest
idle clock state appears
in position 1 instead of position 0, causing inefficient power state
transitions.
System Information:
- GPU: AMD Radeon RX 7900 XT/XTX (PCI ID: 03:00.0)
- Kernel: 6.14.9-300.fc42.x86_64
- Distribution: Fedora 42
- Driver: amdgpu
Current Behavior:
$ cat /sys/class/drm/card1/device/pp_dpm_sclk
0: 500Mhz
1: 120Mhz *
2: 2482Mhz
Expected Behavior:
DPM states should be ordered from lowest to highest:
0: 120Mhz *
1: 500Mhz
2: 2482Mhz
Impact:
- GPU idles at wrong state priority
- Potential increased idle power consumption
- Affects all power profile modes (BOOTUP_DEFAULT, 3D_FULL_SCREEN, COMPUTE,
CUSTOM, etc.)
Steps to Reproduce:
1. Check DPM states: cat /sys/class/drm/card*/device/pp_dpm_sclk
2. Observe state 0 is 500MHz while state 1 is ~120MHz
3. Issue persists across all power profiles and after GPU reset
Additional Information:
- Issue confirmed on kernel 6.14.9
- GPU reset via rocm-smi -d 0 --gpureset does not resolve the issue
- Memory clock DPM states appear correctly ordered
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