What's interesting is when I plug the USB to HDMI dongle into my Fedora
32 system a window pops up that allows me to install a driver for the
dongle. There are two options, one for the MAC and one for Windows.
The Windows driver is dated 2017 the MAC driver is dated Jan 7 2020. So
a driver must exist for the dongle. The dongle is a RayCue USB to HDMI.
Paolo
On 2/8/21 8:58 AM, D. Hugh Redelmeier wrote:
| From: Samuel Sieb <sam...@sieb.net>
| On 2/6/21 5:44 PM, Paolo Galtieri wrote:
| > I'm having an issue running Fedora 33 and an external monitor connected to
| > an HDMI KVM switch. Here is the way it's connected:
| >
| > Laptop thunderbolt 3 connector -> 4 port USB c to USB 3.0 hub -> USB to HDMI
| > adapter -> HDMI KVM switch.
|
| I don't think there are any USB3 video adapters that work with Linux.
The standards are quite confusing.
Among the USB standards, apparently USB4 (note the lack of space in the
name) is the first to (optionally) support HDMI.
<https://en.wikipedia.org/wiki/USB>
On the other hand, a USB-c connector can support a whole bunch of
standards, only some of which are USB (!!!).
<https://en.wikipedia.org/wiki/USB-C>
So: there is no way your setup would work.
You need to use a use a dongle to connect to your laptop port and output
HDMI. Many of those dongles also break out USB 3 and ethernet.
I have a ThinkCentre Tiny that came with a USB-c to HDMI dongle. It
works under Fedora 33 to drive an UltraHD TV. I am having a problem with
the video, but surely it is unrelated to the dongle:
<https://bugzilla.redhat.com/show_bug.cgi?id=1925815>
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