Yet Another Fix Coming for Older AMD GPUs on Linux – Thanks to Valve Developer
8 hours ago
- #Valve
- #Linux
- #AMDGPU
- Timur Kristóf from Valve's Linux graphics driver team is improving support for older AMD Radeon GPUs on Linux.
- Older Radeon GCN 1.0/1.1 GPUs now default to the AMDGPU driver, offering better performance and RADV Vulkan support.
- A bug affecting AMDGPU on Radeon R9 M380 GPUs in Intel-powered iMacs caused boot issues and kernel errors.
- The issue persisted for over a year until Timur identified the problem: insufficient default voltage for the display controller.
- Timur's fix involves disabling memory clock dynamic power management (MCLK DPM) on problematic Sea Islands GPUs.
- Patches are being reviewed for upstream integration, potentially resolving issues for decade-old iMacs with GCN 1.1 GPUs.