hi,
I got this working on my laptop (dual 4K monitors), but It’s complicated, and
compromised the security of dom0 (if that’s okay for you depends on your
reasons for using Qubes)
I’ve sketched out the steps i took below, these intentionally are not step by
step instructions. It’s fragile and you will probably have to do some
debugging...
- ensure that the USB3 controller that you plug the display link adapter into
is attached to Dom0 and not Sys-USB (I had to completely disable my sys-usb
wich breaks other stuff).
This opens up a huge attack surface on Dom0. Only do this if you trust all
the USB devices you’ll be plugging in...
- I needed to rebuild and install the display link and evdi RPMs. I grabbed the
latest src.rpm got each and then rpmbuild in Dom0 to get installable packages
(installing all the build and install dependencies with Qubes-Dom0-update).
This is a terrible idea, I should have used mock in a domU to build the RPMs...
it’s also not ideal to be installing an untrusted binary blob (display link) in
dom0
- (probably related to driving 16billion pixels...) I regularly have to restart
X before I can use the extra screens (stop all vms, remove the X shared memory
file, restart X, setup the extra screens, start the VMs as needed)
It’s probably possible to do this in a cleaner way, run display link in the
sys-usb qube and share the EVDI virtual frame buffer devices between Dom0 and
Sys-USB, but the later part is probably hard to get working reliably...
Hope this is helpful,
‘Tias
Sent from my iPhone
>> On 3 Feb 2020, at 09:33, Omar Morando <[email protected]> wrote:
>
> Hello,
> I'm a Qubes user, I'm using version 4.0.1 on my Dell Inspiron 13 5378 with
> I-7, 16 GB of RAM, 2 TB SSD and everything works well.
>
> I need to use a USB 3.0 HDMI converter for an external monitor, in addition
> to the HDMI port built into the laptop. I have read a couple of topics from
> Reddit about this RPM driver for Fedora but nobody has managed to make it
> work:
> https://github.com/displaylink-rpm/displaylink-rpm
> Do you have any suggestions? Do you know if someone has managed to install it
> or if there is a specific version for Qubes? Searching the net, I did not
> find any other information.
> If you give me support I can do tests that can then be made public for other
> users.
> Thank you
>
>
> Omar Morando
> E // [email protected]
> P // +39-348-4024361
>
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