On Thu, May 22, 2025 at 11:10 AM Durmuş <dozal...@gmail.com> wrote: > > Hello, > > I'm experiencing a critical issue on my system with an AMD RX 470 GPU. > When booting with recent kernel versions (6.7.x or newer), the system > fails to boot properly unless I explicitly disable Dynamic Power > Management (DPM) via the `amdgpu.dpm=0` kernel parameter. > > When DPM is enabled (`amdgpu.dpm=1` or omitted, since it's the > default), the system either freezes during early boot or fails to > initialize the display. However, using the LTS kernel (6.6.x), > everything works as expected with DPM enabled.
Are you still having an issue with newer kernels? E.g., 6.14 or 6.15? I haven't seen any problems with polaris boards here. If 6.6.x works, but 6.7 does not, can you bisect? Alex > > This seems to be a regression introduced in kernel 6.7 or later, and > it specifically affects older GCN4 (Polaris) GPUs like the RX 470. > Disabling DPM allows the system to boot, but significantly reduces GPU > performance. > > Things I’ve tried: > - Confirmed that the latest `linux-firmware` is installed. > - Verified correct firmware files exist under `/lib/firmware/amdgpu/`. > - Tested multiple kernels (mainline and LTS). > - Using Mesa with ACO (Radeon open driver stack). > - System boots fine with LTS kernel (6.6.x) + DPM enabled. > > System info: > - GPU: AMD RX 470 (GCN 4 / Polaris) > - Distro: Arch Linux > - Kernel (working): linux-lts 6.6.x > - Kernel (broken): 6.7.x and newer (currently tested on 6.14.6) > > Thanks in advance, > Durmus Ozaltay
