DisplayLinkManager 1.1.62 - ERROR: modprobe: ERROR: could not insert 'evdi': Required

Ulrick · 05-17-2016, 02:45 PM

Hi,

I just downloaded and tried the latest drivers with ubuntu 16.04 , but with no luck.

I get the following error message:

modprobe: ERROR: could not insert 'evdi': Required key not available

I have tried to sign the module, but I'm not an expert and thus I'm probably not able to do it.

Thanks for your support,

Ulrick

Vanadium · 05-19-2016, 08:00 AM

As a workaround, try turning off secure boot in your bios (i.e. UEFI, but insecure)

Ulrick · 05-24-2016, 09:24 AM

Thanks Vanadium, it works now, and it is for sure better than nothing, but I still have some strange behaviours.

On my built in display, if I drag an application window to the right edge, it than place it in the middle and I cannot even enlarge the right side, but I have to move it and then enlarge the left side if the application window.

The external display instead, just show some resolutions, but not all of them.

But like I said,

Better than nothing!

UPDATE: after a couple of reboot, the build in display seems to work a little bit better (start blank, but reapplying changes it power on) , but the external display show always a limited amount of screen resolutions and has some glitches.

Thanks,

Ulrick

Vanadium · 05-24-2016, 11:05 AM

I do not have the experience. If I do not mirror the displays, the external display is extremely jerky. The display is fluid when I mirror the displays, but still DisplayLinkManager uses 20% CPU while idle - currently, it even stays at 70% even if I am not typing. It all works poorly, and that on a Dell XPS 13 that officially is supported for Ubuntu.

Ulrick · 05-24-2016, 12:40 PM

Quote:

Originally Posted by Vanadium

I do not have the experience. If I do not mirror the displays, the external display is extremely jerky. The display is fluid when I mirror the displays, but still DisplayLinkManager uses 20% CPU while idle - currently, it even stays at 70% even if I am not typing. It all works poorly, and that on a Dell XPS 13 that officially is supported for Ubuntu.

Yes, I have a very low performance and I'm using a Yoga 3 laptop, so I can feel that lots of power is used to update the external display.

Doing nothing, it uses 8% of CPU, and just moving the mouse in the external display goes up to almost 50%

05-24-2016, 09:24 AM	#3
Ulrick Junior Member Join Date: May 2016 Posts: 3	Disabling Secure Boot Works, but there asre still some strange behaviours Thanks Vanadium, it works now, and it is for sure better than nothing, but I still have some strange behaviours. On my built in display, if I drag an application window to the right edge, it than place it in the middle and I cannot even enlarge the right side, but I have to move it and then enlarge the left side if the application window. The external display instead, just show some resolutions, but not all of them. But like I said, Better than nothing! UPDATE: after a couple of reboot, the build in display seems to work a little bit better (start blank, but reapplying changes it power on) , but the external display show always a limited amount of screen resolutions and has some glitches. Thanks, Ulrick Last edited by Ulrick; 05-24-2016 at 12:37 PM.

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05-19-2016, 08:00 AM	#2
Vanadium Junior Member Join Date: May 2016 Posts: 5	As a workaround, try turning off secure boot in your bios (i.e. UEFI, but insecure)

05-24-2016, 11:05 AM	#4
Vanadium Junior Member Join Date: May 2016 Posts: 5	I do not have the experience. If I do not mirror the displays, the external display is extremely jerky. The display is fluid when I mirror the displays, but still DisplayLinkManager uses 20% CPU while idle - currently, it even stays at 70% even if I am not typing. It all works poorly, and that on a Dell XPS 13 that officially is supported for Ubuntu.