Public bug reported: Setup: I have installed the latest 20.04 LTS Ubuntu software on my raspberry pi 4b The kernel was 5.4.0-1008.8 in config.txt I have ... dtoverlay=vc4-fkms-v3d max_framebuffers=2 ... I am running ubuntu-desktop
Problem: When displaying the gnome-system-monitor (as an example) it uses 52% cpu This is because this Ubuntu version has no hardware scrolling when running glxgears it uses 100% cpu and achieves 42 frames/second I am afraid I do not know how to build the official ubuntu kernel Instead I used the rpi kernel -Linux ubuntu 5.4.35-v8+ #1 SMP PREEMPT Tue Apr 28 13:28:41 UTC 2020 aarch64 aarch64 aarch64 GNU/Linux With this kernel displaying gnome-system-monitor uses only 10% cpu as scrolling is performed by the hardware when running glxgears it uses only 20% cpu and achieves 50 frames/second I asked you to enable v3d in kernel 4.18 but it caused problems https://bugs.launchpad.net/ubuntu/+source/linux-raspi2/+bug/1850876 If you could show me the official way to modify your raspi kernel, I am willing to check if those problems you encountered 6 months ago still exist. Failing that, could you guys please retry it? In my opinion, this change transforms Ubuntu on PI from a toy to a working tool. Two pieces of software I use in development (vscode and chromium-browser) lose the 'treacle' feel. ** Affects: linux-raspi (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1875936 Title: video acceleration To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1875936/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs