Comment # 20
on bug 101691
from Ethan Hsieh
amdgpu.dpm=0 doesn't really work. There are some issues when loading amdgpu driver with dpm=0. It leads to using Intel as OpenGL renderer (glxinfo) instead of AMD. Error Message: Xorg.0.log:[ 24.261] (II) UnloadModule: "amdgpu" I got two patches from AMD to fix the issue. After applying patches, tearing issue is back. Here are some new findings: The issue can be reproudced on 5916&5917. But, I only see the issue on 5916 when running glxgears with fullscreen. When unplugging power adapter and running glxgear with default window size, the issue on 5917 is gone. Test Environment: Device 1 (5916): a. Graphics Cards: Intel [8086:5916] + AMD [1002:6900] b. Kernel: 4.4.0-45 Device 2 (5917): a. Graphics Cards: Intel [8086:5917] + AMD [1002:6900] b. Kernel: 4.4.0-73 Test Result: 1. AC Mode: (Power Adapter) Device 1 (5916): $ DRI_PRIME=1 glxgear: PASS $ DRI_PRIME=1 glxgear -fullscreen: tearing Device 2 (5917): $ DRI_PRIME=1 glxgear: tearing $ DRI_PRIME=1 glxgear -fullscreen: tearing 2. DC Mode: (Battery) Device 1 (5916): $ DRI_PRIME=1 glxgear: PASS $ DRI_PRIME=1 glxgear -fullscreen: tearing Device 2 (5917): $ DRI_PRIME=1 glxgear: PASS $ DRI_PRIME=1 glxgear -fullscreen: tearing
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