void-linux / void-linux/void-packages
DisplayLink GPU's (udl driver) broken because udlfb (CONFIG_FB_UDL) driver is enabled
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Description
Is this a new report?
Yes
System Info
Void 5.18.19_1 ppc64 pSeries uptodate FF
Package(s) Affected
linux5.18-5.18.19_1
Does a report exist for this bug with the project's home (upstream) and/or another distro?
https://bugs.archlinux.org/task/56817
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1011986
Expected behaviour
The DisplayLink GPU should be automatically detected by GNOME/Wayland; my desktop should be displayed on it.
Actual behaviour
The DisplayLink GPU is not detected by GNOME/Wayland; my desktop is not displayed on it. It can be fixed manually by blacklisting the udlfb Linux driver and rebooting. This happens because the udlfb driver is deprecated and interferes with the correct driver, udl. I believe Void should disable the CONFIG_FB_UDL option in Linux to fix this properly.
Steps to reproduce
- Install GNOME with Wayland.
- Launch a GNOME/Wayland session.
- Plug in a DisplayLink USB 2.0 GPU, such as a StarTech USB2DVIPRO2.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start by locating the linux5.18 package configuration and the CONFIG_FB_UDL setting. Compare the package's enabled options with the reported udlfb and udl behavior, then verify that disabling CONFIG_FB_UDL allows a DisplayLink GPU to be detected in a GNOME/Wayland session.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- linux
- Domain
- operating-systems
- Issue type
- Bug
- Difficulty
- 2/5
- Estimated time
- 1-3 hours
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100