Re: [qubes-users] How to install DisplayLink USB to HDMI converter

2020-10-16 Thread 'Amir Omidi' via qubes-users 


How do you get dom0 to interface with the PCI? I've followed all of these 
steps but xrandr still can't find other displays.
On Tuesday, February 4, 2020 at 12:39:22 AM UTC-8 matt...@gmail.com wrote:

> 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  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 // omar.m...@hotmail.it
> P // +39-348-4024361 <+39%20348%20402%204361>
> [image: Sent from Mailspring] 
>
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>  
> 
> .
>
>

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Re: [qubes-users] How to install DisplayLink USB to HDMI converter

2020-02-05 Thread Omar Morando 
Hi Matthis,
thanks a lot for your help.

Ok, I use Qubes for security reasons and I don't want to compromise the 
security of dom0, even if the second external monitor is important for working 
better.

I prefer to wait for a different solution, hoping that someone somewhere will 
be able to use displaylink while maintaining system security.

Thanks again, ciao

Omar Morando
E // omar.mora...@hotmail.it
P // +39-348-4024361
On Feb 4 2020, at 9:39 am, Matthias Horn  wrote:
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  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 // omar.mora...@hotmail.it
P // +39-348-4024361

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Re: [qubes-users] How to install DisplayLink USB to HDMI converter

2020-02-04 Thread Matthias Horn 
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  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 // omar.mora...@hotmail.it
> P // +39-348-4024361
> 
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> You received this message because you are subscribed to the Google Groups 
> "qubes-users" group.
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