[Bug 1890802] Re: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland
The bug you logged here is about Xorg fractional scaling, not Wayland. They are different code bases. Please keep comments here about Xorg and if you see problems with Wayland then open a new bug. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890802 Title: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1890802/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890802] Re: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland
I tried the old Intel i965 driver, however, I didn't notice any difference, so I switched back. BTW I tested only Wayland because of the fractional scaling. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890802 Title: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1890802/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890802] Re: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland
Indeed, if you prefer long term stability then you should stay on 20.04. We will be backporting some performance fixes to 20.04 as soon as it is safe to do so. In fact a couple are coming in mutter 3.36.4 and another in 3.36.5... If you want to make 4K significantly faster on 20.04 in a safe way right now, then I recommend forcing it to use the old Intel driver which is better at frequency scaling. Just edit /etc/environment and add a new line: MESA_LOADER_DRIVER_OVERRIDE=i965 and then reboot. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890802 Title: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1890802/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890802] Re: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland
I really hope that performance-related fixes could be backported to Ubuntu 20.04 so that I would not have to upgrade to 20.10. I have never upgraded to a non-LTS release since Trusty 14.04. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890802 Title: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1890802/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1890802] Re: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland
This is expected. Fractional scaling in Xorg sessions works by rendering at a higher resolution than your screen(s). So that increases the likelihood of stuttering compared to integer scaling. That specific issue will never be fixed because it's a required trade- off to get fractional scaling working in Xorg. HOWEVER, general performance will increase a lot in future versions like Ubuntu 20.10 so that hopefully will be enough to offset and eliminate all the problems you see. As for fractional scaling making things slower than not scaling, that is expected and can't be fixed. If you can then please use Wayland instead. ** Tags added: xrandr-scaling ** Changed in: mutter (Ubuntu) Status: New => Won't Fix -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1890802 Title: Big performance degradation in X11 + 4K resolution + fractional scaling in second monitor compared to Wayland To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/1890802/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
