Completely unusable in Ubuntu 20.04

caitifty · 05-14-2020, 11:57 PM

Ok, an update. If I plug my xp13 laptop with a fresh install of 20.04 into my dell displaylink dock (D6000) and *don't* turn off the laptop monitor, everything is fast and useable. It's only if you either use the display settings to turn off the laptop screen (as you normally would for a docked laptop configuration) or physically close the lid of the laptop that everything goes glacial. Not a perfect fix, but at least it makes things workable again.

socken23 · 05-15-2020, 05:59 PM

Quote:

Originally Posted by caitifty

and *don't* turn off the laptop monitor, everything is fast and useable.

Thanks a lot! That actually solves it for me at the moment. Took me about 2 minutes to activate the laptop screen in the settings because everything is sooo slow

rick_pri · 05-27-2020, 08:27 AM

Has anyone else found that any applications on the laptop screen itself are very slow (under wayland)?

Code:

echo $XDG_SESSION_TYPE    # to check which compositor you're using

colsartoris · 05-27-2020, 11:37 AM

I'm seeing the exact same issues from a desktop machine. If I have one monitor plugged in directly, the second monitor plugged into the docking station works. If they are both plugged into the docking station, it is so slow as to be unusable. This behavior is different than previous releases of Ubuntu when I would have to change the pageflip Display setting in xorg.conf.d. Now, the screen draws OK, the mouse moves around just fine; however, you have to hover over an icon for several seconds before you can click it, and wait several seconds after you click it for the interaction to be registered. The same with the keyboard: even in a pico editor each key strike takes several seconds to register in the terminal. For me, the DisplayLink driver only works for 1 monitor and then only if I am directly plugged into my video card for my primary monitor. This is less than optimal for me.

ScreamCZE · 05-28-2020, 10:26 AM

Is internal laptop's screen turned off? I noticed that on my laptop too. But only when my laptop's screen is turned off. When the laptop's screen is turned on, everything works without any problem.

zwhitchcox · 08-26-2021, 11:01 PM

This is fixed up stream on xserver-xorg-core now, the distros just have to merge the change.

there is a workaround right now by adding

```
LIBGL_DRI3_DISABLE=true
```

to your /etc/environment file

justtotellyouthanks · 10-09-2021, 10:21 PM

Had to create an account to thank you. Not sure what this does but this solved my issue on ubuntu 20.04.3 , gnome 3.36.8 and windowing system x11. Thank you!

Quote:

Originally Posted by zwhitchcox

This is fixed up stream on xserver-xorg-core now, the distros just have to merge the change.

there is a workaround right now by adding

```
LIBGL_DRI3_DISABLE=true
```

to your /etc/environment file

peddanet · 08-27-2021, 08:18 PM

For me one (bad) solution here works, I tried to describe it here as far as I have experienced it, my external monitors now worked:

https://askubuntu.com/questions/1358...-2021-after-up

But that means going back to kernel v5.4 (probably also any kernel up to v5.5) and fix it there. You do not have to follow my steps to go to Ubuntu 21.04. At least I think this was only party of my way.

The problem is that the sources of evdi has slightly changed to support modern kernels up to v5.13. Some pointer prototypes changed, But that would mean that just compiling and installing the new evdi driver would fix it for the new kernel >v5.11. But for my experiences that is not enough. External monitors are then detected but system freezes immediately after login. So I guess the DisplayLink App is somehow involved and must comply to the evdi interface.

Is there any way to get to this sources to just fix this quicker?

perceval · 09-02-2021, 10:37 AM

I have the same problem, my second screen is really slow and my cpu is heating a lot.
I'm on Ubuntu 20.04 frsh install on a Asus vivobook laptop with a AMD Ryzen CPU.
Closing or opening the lid does not change anything. I tried using X11 and Waylan with the same bad results.

I don't know what to do, could DisplayLink fix the driver?

05-14-2020, 11:57 PM	#1
caitifty Junior Member Join Date: May 2020 Posts: 4	Update/workaround Ok, an update. If I plug my xp13 laptop with a fresh install of 20.04 into my dell displaylink dock (D6000) and don't turn off the laptop monitor, everything is fast and useable. It's only if you either use the display settings to turn off the laptop screen (as you normally would for a docked laptop configuration) or physically close the lid of the laptop that everything goes glacial. Not a perfect fix, but at least it makes things workable again.

05-27-2020, 08:27 AM	#3
rick_pri Junior Member Join Date: May 2019 Posts: 9	Has anyone else found that any applications on the laptop screen itself are very slow (under wayland)? Code: echo $XDG_SESSION_TYPE # to check which compositor you're using

08-26-2021, 11:01 PM	#6
zwhitchcox Junior Member Join Date: Jul 2021 Posts: 3	Workaround This is fixed up stream on xserver-xorg-core now, the distros just have to merge the change. there is a workaround right now by adding ``` LIBGL_DRI3_DISABLE=true ``` to your /etc/environment file

08-27-2021, 08:18 PM	#8
peddanet Junior Member Join Date: Aug 2021 Posts: 1	Workaround with fixed kernel v5.4 For me one (bad) solution here works, I tried to describe it here as far as I have experienced it, my external monitors now worked: https://askubuntu.com/questions/1358...-2021-after-up But that means going back to kernel v5.4 (probably also any kernel up to v5.5) and fix it there. You do not have to follow my steps to go to Ubuntu 21.04. At least I think this was only party of my way. The problem is that the sources of evdi has slightly changed to support modern kernels up to v5.13. Some pointer prototypes changed, But that would mean that just compiling and installing the new evdi driver would fix it for the new kernel >v5.11. But for my experiences that is not enough. External monitors are then detected but system freezes immediately after login. So I guess the DisplayLink App is somehow involved and must comply to the evdi interface. Is there any way to get to this sources to just fix this quicker? Last edited by peddanet; 08-27-2021 at 08:20 PM.

09-02-2021, 10:37 AM	#9
perceval Junior Member Join Date: Sep 2021 Posts: 2	same here I have the same problem, my second screen is really slow and my cpu is heating a lot. I'm on Ubuntu 20.04 frsh install on a Asus vivobook laptop with a AMD Ryzen CPU. Closing or opening the lid does not change anything. I tried using X11 and Waylan with the same bad results. I don't know what to do, could DisplayLink fix the driver?

05-27-2020, 11:37 AM	#4
colsartoris Junior Member Join Date: May 2020 Posts: 2	I'm seeing the exact same issues from a desktop machine. If I have one monitor plugged in directly, the second monitor plugged into the docking station works. If they are both plugged into the docking station, it is so slow as to be unusable. This behavior is different than previous releases of Ubuntu when I would have to change the pageflip Display setting in xorg.conf.d. Now, the screen draws OK, the mouse moves around just fine; however, you have to hover over an icon for several seconds before you can click it, and wait several seconds after you click it for the interaction to be registered. The same with the keyboard: even in a pico editor each key strike takes several seconds to register in the terminal. For me, the DisplayLink driver only works for 1 monitor and then only if I am directly plugged into my video card for my primary monitor. This is less than optimal for me.

05-28-2020, 10:26 AM	#5
ScreamCZE Member Join Date: Jun 2018 Posts: 49	Is internal laptop's screen turned off? I noticed that on my laptop too. But only when my laptop's screen is turned off. When the laptop's screen is turned on, everything works without any problem.