Performance slowdown when lid is closed (XPS13 - ubuntu 20.04)
 
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Performance slowdown when lid is closed (XPS13 - ubuntu 20.04)  

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tscolari
(@tscolari)
Active Member
Joined: 12 months ago
 

Hello all,

I've a Razer Core-X and an AMD RX 5700 X connected to my XPS13.

The external display works as expected until I close the laptop lid. I keep both displays as mirrored as my intention is to only use the external display, but as soon as a close, everything gets "slower", clicking menus take 10s of seconds to open, and as soon as I open the laptop lid it starts working at normal speed again.

Is this something someone has seen before or have any idea on how to fix it?

Many thanks in advance.

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Sebulon
(@sebulon)
Trusted Member
Joined: 2 years ago
 

@tscolari, no solution, just a +1

On the positive side, we seem to be using very different hardware. I have a ThinkPad X280, Akitio Node and a GTX1060, running openSUSE Tumbleweed with KDE. What are you running?

 

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tscolari
(@tscolari)
Active Member
Joined: 12 months ago
 
Posted by: @sebulon

@tscolari, no solution, just a +1

On the positive side, we seem to be using very different hardware. I have a ThinkPad X280, Akitio Node and a GTX1060, running openSUSE Tumbleweed with KDE. What are you running?

 

Well, I guess we can eliminate some of the things that are not common: gnome x kde, nvidia x amd, ubuntu x opensuse, thinkpad x dell haha

I'm wondering if it could be down to X, I'm using Xorg here, are you using wayland?

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Sebulon
(@sebulon)
Trusted Member
Joined: 2 years ago
 

@tscolari, wow, haha! Yeah I'm also running good 'ol X, so that's about the only thing we have in common LoL

 

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ZBooksuperfan
(@zbooksuperfan)
New Member
Joined: 1 month ago
 

Hello,

I am experiencing this same issue on my Zbook 15 G1.

I just recently upgraded the internal MXM GPU from a M1000M (also a previous upgrade) to an AMD WX4150.

On Windows the external display works fine with no problems. But on Ubuntu 20.04 switching to the external display only, causes extreme low frame rate and responsiveness (1 frame per second measured via glxgears) for every application except the mouse cursor. I think the problem is that the Intel iGPU is being selected for the external display (which it cannot actually support) as I think I encountered this issue a few years back in 16.04 when I upgraded the GPU. Back then there was some complicated process that involved setting the external display to be rendered by the dGPU, but I kept installing different versions of the nvidia driver till I found one that worked.

Need to configure Xorg to use the dGPU, but I don't know how.

This post was modified 1 month ago

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ZBooksuperfan
(@zbooksuperfan)
New Member
Joined: 1 month ago
 

Hello again.

I installed Manjaro (Gnome) on a seperate SSD to see is changing OS would solve the issue, and it did! The external display runs fine and with any performance loss when the lid is closed.

Since Manjaro Gnome uses Wayland, the problem is with Xorg itself @tscolari

 

 

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tscolari
(@tscolari)
Active Member
Joined: 12 months ago
 

You are absolutely right!

I've just tested starting ubuntu on wayland instead of xorg and the closed lid does not affect performance anymore!

 

To do: Create my signature with system and expected eGPU configuration information to give context to my posts. I have no builds.

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