hidpi-daemon VS cosmic-comp

On the github page for the HiDPI Daemon it says "This program is for managing HiDPI and LoDPI monitors on X. This program is installed by default in Pop!_OS and Ubuntu (if installed by System76 and can be added with this article)."

> System76 with Pop_OS! has an opportunity to tackle topics head on like "we can make fractional scaling work somewhat decently across all apps" (IIUC currently requires shipping a forked XWayland, unfortunately)

I'm excited to see System76's implementation of fractional scaling in this new desktop environment. Since they have actually sold laptops with 1080p and sometimes 4K displays, they have a real incentive to get this feature working smoothly on Wayland.

System76 previously developed a HiDPI daemon for X11 to be used with GNOME Shell:

- Blog post: https://blog.system76.com/post/174414833678/all-about-the-hi...

- Help page: https://support.system76.com/articles/hidpi-multi-monitor/

- Source: https://github.com/pop-os/hidpi-daemon

It handles multiple scaling factors, including fractional ones, flawlessly across displays.

If the next version of COSMIC supports fractional scaling on Wayland as well as this daemon does on X11, this alone would make the entire project will be worth it. GNOME Shell still hides fine-grained fractional scaling behind an experimental flag for both X11 and Wayland, with X11 needing a patch for Mutter.

Hi u/Borisminator! I'm a razer+Pop!_OS user too. Mine is the early2020. A couple of questions: - Are you having the scratching noise when the fans start up? (https://www.reddit.com/r/razer/comments/jvh90m/razer_blade_2020_scratching_noise_when_fans_start/ - my video in the comments) - I'm having lots of errors from hidpi-daemon when I set hybrid mode ( https://github.com/pop-os/hidpi-daemon/issues/34 and https://github.com/pop-os/hidpi-daemon/issues/38 )

The following Linux distributions support different scaling factors on different displays by default: Pop!_OS, Ubuntu, Linux Mint, and Manjaro.

Pop!_OS (developed by System76) created its own HiDPI daemon to handle HiDPI and LoDPI displays on X11 at the same time:

https://github.com/pop-os/hidpi-daemon

https://blog.system76.com/post/174414833678/all-about-the-hi...

Ubuntu's fork of the Mutter display manager (used by its fork of GNOME) includes a patch to handle different display resolutions for HiDPI and LoDPI displays on X11:

https://bugs.launchpad.net/ubuntu/+source/mutter/+bug/182085...

Linux Mint implemented fractional display scaling, with different settings for each display, in Cinnamon 4.6:

https://blog.linuxmint.com/?p=3858

Arch Linux users can also use Cinnamon for the same features.

If you are using Manjaro, you can install the mutter-x11-scaling package to replace Mutter with a version that includes Ubuntu's changes:

https://gitlab.manjaro.org/packages/extra/mutter-x11-scaling...

https://github.com/puxplaying/mutter-x11-scaling

Finally, if you are using GNOME on Wayland, mixed scaling is already supported. To enable fractional scaling, activate the "scale-monitor-framebuffer" setting:

https://wiki.archlinux.org/index.php/HiDPI#GNOME

On Wayland, scaled applications that do not use GTK 3+ or Qt 5+ may appear blurry. This affects all Electron applications. X11 does not have the same issue, but Wayland is generally more stable than X11 in other areas.

Maybe take a look at cosmic-comp it is currently in development by System76 for their own Cosmic DE. Smithay also has Anvil and Smallvil contained in it's repository, both are example implementations of a compositor using Smithay.

cosmic-comp

COSMIC DE isn't a singular thing, it's a project of several smaller projects being built on top of each other, like the cosmic-text project that'll be used for font rendering and this new cosmic-comp UI compositor project.

we have a lot of Rust projects of different scopes, but I am mostly working on cosmic-comp, a wayland compositor for our new upcoming Linux Desktop Environment. All Open-Source: https://github.com/pop-os/cosmic-comp

Thanks for the reply /u/mmstick. Also, would you know what causes this issue: https://github.com/pop-os/cosmic-comp/issues/28 I keep running into it when trying to compile cosmic-epoch

See https://github.com/pop-os/cosmic-comp

We hired the talent behind smithay, and cosmic-comp is based on it, which has been developed to the point where we have an early prototype with some functioning wayland-shell applets.