DisplayLink Support
Closed this issue · 9 comments
(copying the issue template from hyprland)
System Info and Version
System/Version info
Hyprland, built from branch at commit cba1ade848feac44b2eda677503900639581c3f4 (props: bump version to 0.40.0). Date: Sat May 4 15:42:32 2024 Tag: v0.40.0, commits: 4606flags: (if any)
System Information:
System name: Linux
Node name: censored
Release: 6.8.10-400.asahi.fc40.aarch64+16k
Version: #1 SMP PREEMPT_DYNAMIC Mon May 27 16:05:41 UTC 2024
GPU information:
os-release: NAME="Fedora Linux Asahi Remix"
VERSION="40 (Workstation Edition)"
ID=fedora-asahi-remix
ID_LIKE=fedora
VERSION_ID=40
VERSION_CODENAME=""
PLATFORM_ID="platform:f40"
PRETTY_NAME="Fedora Linux Asahi Remix 40 (Workstation Edition)"
ANSI_COLOR="0;38;2;60;110;180"
LOGO=fedora-logo-icon
CPE_NAME="cpe:/o:fedoraproject:fedora-asahi-remix:40"
DEFAULT_HOSTNAME="fedora"
HOME_URL="https://fedora-asahi-remix.org/"
DOCUMENTATION_URL="https://docs.fedoraproject.org/en-US/fedora/f40/system-administrators-guide/"
SUPPORT_URL="https://discussion.fedoraproject.org/c/neighbors/asahi/asahi-help/94"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Fedora"
REDHAT_BUGZILLA_PRODUCT_VERSION=40
REDHAT_SUPPORT_PRODUCT="Fedora"
REDHAT_SUPPORT_PRODUCT_VERSION=40
VARIANT="Workstation Edition"
VARIANT_ID=workstation
plugins:
Bug or Regression?
Bug
Description
DisplayLink dongles are USB-to-HDMI (or some other display connector) devices that use some Synaptics black magic to transfer the display signal over USB instead of USBs DP alt-mode.
Currently, attempting to start Hyprland with the DisplayLink drivers installed (from synaptics' website) just crashes Hyprland outright, unless WLR_RENDERER_ALLOW_SOFTWARE is enabled. From what I've been able to find this is due to missing wlroots support, everything works on gnome/mutter.
Supposedly this patch makes "regular" wlroots play nice with DisplayLink, unfortunately I haven't been able to manually build hyprland on my machine so I haven't been able to test it out.
How to reproduce
Install the DisplayLink drivers. It doesn't seem to whether a dongle is plugged in or not, just having the drivers installed is enough to crash Hyprland.
Crash reports, logs, images, videos
you can throw the patch into patches/ and it will automatically be applied during build.
g clone --recursive https://github.com/hyprwm/Hyprland
go into subprojects/wlroots-hyprland
throw the patch into patches/
build hyprland normally
you can throw the patch into
patches/and it will automatically be applied during build.
Unfortunately I can't build hyprland on arm64 Fedora, seems like build issues on Fedora are pretty common (and yes, I've followed the steps in hyprwm/Hyprland#284) and the arm64 part probably doesn't help.
If I set up an Arch arm64 VM, build hyrland there and copy the binary to my fedora system, would that work?
likely not
feel free
Ran into a few issues setting up Hyprland + Evdi/DisplayLink - documenting here in hopes it'll helps someone.
My Laptop has an integrated intel GPU and a dedicated Nvidia GPU.
I have two external monitors connected via a wavlink docking station. A few options I explored to get the triple-screen setup working:
- ❌ Using Nvidia proprietary drivers
- could not get
hyprctl monitorsto detect the two external monitors
- could not get
- ❌ Using nouveau
- all 3 monitors render properly, but Hyprland crashes often (I couldn't deduce why) and was occasionally laggy
- ✅ Using intel integrated graphics
- this is what I ultimately went with - it's also recommended in the Multi-GPU Hyprland docs
- out of the box, monitors were detected with
hyprctl monitors, but no signals (black screen) - works well after manually patching wlroots
For (3), the workaround and explanation provided by Kacper Zuk is available here (do note the caveats):
Specific to Hyprland, building from source, the steps are:
- Clone the respository after installing all dependencies as per the installation docs:
git clone --recursive https://github.com/hyprwm/Hyprland cd Hyprland - Edit one line in
subprojects/wlroots-hyprland/backend/backend.cusing the hack by Kacper Zuk, i.e:// change this line (at line 261 for me for wlroots-hyprland commit hash 422207db): struct wlr_backend *drm = wlr_drm_backend_create(session, gpus[i], primary_gpu); // to this: struct wlr_backend *drm = wlr_drm_backend_create(session, gpus[i], NULL);
- Build, then restart Hyprland
make all && sudo make install
Other details
Hyprland Version:
Hyprland, built from branch main at commit d7ea1b7785f31e9fd6477490309721a19a835592
Tag: v0.41.2-14-gd7ea1b77, commits: 4900
linux version: 6.9.7.arch1-1
evdi-git version: 1.14.5.r2.ge36efa8-1
displaylink version: 6.0-0
This patch is not working correctly.
hyprctl monitors is able to detect the displays, but nothing happens and some apps like waybar crash or freeze.
I have maintained these AUR Packages for a while: https://aur.archlinux.org/pkgbase/hyprland-displaylink-git/
it had a working Patch til Hyprland 0.38.1 https://aur.archlinux.org/cgit/aur.git/tree/displaylink.patch?h=hyprland-displaylink-git
With the combination of patched wlroots https://gitlab.freedesktop.org/kennylevinsen/wlroots/-/compare/master...displaylink-hack?from_project_id=12103
Using the "hack", now DisplayLink is working perfectly in my hyprland. However, i noticed that my laptop fan will constantly be running super loud (Temp > 75°C) with just a Firefox tab.
Then i checked the CPU usage and here's the result
Never experienced this before, Just switch to Hyprland yesterday
@Dev-Aligator see if you can reproduce the same issue on Sway or DWL (may need to apply the same wlroots patch elsewhere). If you can, then it may not be a wlroots-hyprland issue. You could also visit the original issue on wlroots to see if anyone else has the same problem there.