** Description changed: [Impact] + Run `glxgears -fullscreen` and the FPS can't stay at 60 FPS + 298 frames in 5.0 seconds = 59.465 FPS + 241 frames in 5.0 seconds = 48.193 FPS + 261 frames in 5.0 seconds = 52.030 FPS + 268 frames in 5.0 seconds = 53.596 FPS [Fix] + Bisect the kernel and found a commit in v6.9-rc1 fixes the issue + c08c364102d0 drm/i915: Bypass LMEMBAR/GTTMMADR for MTL stolen memory access [Test] + 1. Run `glxgears -fullscreen` on MTL platforms + 2. The FPS should be always around 60 [Where problems could occur] + It's a workaround only affects MTL platforms, and there is no "fixed commit" for this patch after v6.9-rc1. So, it should be safe and essential for MTL platforms.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2069380 Title: FPS of glxgear with fullscreen is too low on MTL platform To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2069380/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
