I suggest you ...

Ubuntu drivers eating a lot of CPU. Not always but at least 50% of the times

I have actually a very slow PC because of this:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1541 root 20 0 2343424 51804 2624 S 111.9 1.4 198:49.14 DisplayLinkMana
in other words, DisplayLinkMana(ger) eats a lot of CPU. from 50 to more than 100%

sometimes not.

I think this is an issue, that should be fixed.

Thank you.

alfonso

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    Alfonso Mantero shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

    11 comments

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      • Anonymous commented  ·   ·  Flag as inappropriate

        I've been using this dock for a few weeks now, and I hadn't noticed this before, because my beast XPS13 can easily handle it. Though I'm having the same problems as before mentioned, I haven't experienced any video issues (only use a single 1080p 75HZ monitor), but even with the DisplayLink disconnected the DisplayLinkManager CPU usage varies between 15-20%. When the DisplayLink is connected it varies between 15-150%.

      • Geoff commented  ·   ·  Flag as inappropriate

        just got this dock and its just not going to work out if it stays this way. I only connected one extra monitor and two external hard drives. I have a new Inspiron 5570 i7 with 12 gigs of ram and a pci 512 m2 drive. I am running 18.04 fresh install of Kubuntu. I know its not the system or peripherals slowing things down... Its your product. Are you going to solve this problem or not. I will have to return it if there is no response to this.

      • Ben commented  ·   ·  Flag as inappropriate

        Same issue here. Video is unbearably choppy. I am showing 4k@60hz on my external display, but displaylinkmanager service is consuming a minimum of 100% cpu while any drawing is going on. Even basic 1080p youtube video is too choppy to watch.
        Anyone from Displaylink goona chime in here and hopefully find us a fix? Love the dock itself. Hate to have to return it.

      • Ben commented  ·   ·  Flag as inappropriate

        Same issue here. Video is unbearably choppy. I am showing 4k@60hz on my external display, but displaylinkmanager service is consuming a minimum of 100% cpu while any drawing is going on. Even basic 1080p youtube video is too choppy to watch.
        Anyone from Displaylink goona chime in here and hopefully find us a fix? Love the dock itself. Hate to have to return it.

      • Damian Chiliński commented  ·   ·  Flag as inappropriate

        CPU utilization of DisplayLink on Linux strongly depends on particular application that is used. I noticed heavy CPU usage when compiz (compositor) is used comparing to when it's not. Also using remote Xorg display powered by DL device (export DISPLAY=10.0.0.2:0 on remote machine, when 10.0.0.2 machine is using DL) results in insane CPU load. There's a lot of cases that make DL display struggle significantly. However I think it's related to number of draw operations issues by certain software, comparing to others.

      • Anonymous commented  ·   ·  Flag as inappropriate

        Same on HP Elitebook 1030 G2 x360 running Ubuntu 17.10, Targus ACP78US dock and Dell U3415W Monitor. The CPU utilization by DisplayLink Manager is consistently between 40% and 110%. Is this normal?

      • Anonymous commented  ·   ·  Flag as inappropriate

        Tested with the latest Ubuntu 17.10, a Dell XPS13 9360, a Dell dock D3100 and 2 iiyama prolite screens, the driver works pretty fine but... after some niutes, it take too much CPU resources ! It's over 150%... CPU fans gonna be crazy and CPU temp reach 80° very quickly...
        As a consequence, unfortunetly, I just cannot use the displaylink dock :(

        On my side, I can try to investigate more deeply if needed,

        Thanks

      • Anonymous commented  ·   ·  Flag as inappropriate

        I have the same issue. I'm using Dell Latitude 7280 connecting to Dell universal dock D6000, with two Dell monitors. The OS is Ubuntu 16.04.3 with kernel 4.10.0-35. The CPU goes very high and stays around 30% when idle. When resuming from sleep it keeps 100+% and don't go down even when idle.

      • Vytenis commented  ·   ·  Flag as inappropriate

        It eats a lot of my CPU too on Fedora KDE. Normally 40-50%, but when I watch youtube, more than 100%.

      • Anonymous commented  ·   ·  Flag as inappropriate

        Lots of people reporting very high cpu usage on Linux Ubuntu. I have got the same problem (but I can not report the bug, because I have no access to your support forum, neither I can not contact you directly, because the contact forms are not working...).

        Example configuration:
        OS info: Linux-3.16.0-77-generic-x86_64-with-Ubuntu-14.04-trusty
        CPU info: Intel(R) Core(TM) i5-4210U CPU @ 1.70GHz Cache: 3072 KB Cores: 2
        Installed RAM: 8097920 kB
        DL driver version: 1.3.52
        Hardware: ACER Aspire v3-371
        Connected Devices on the docking station: USB-Mouse, USB-Keyboard, HDMI-Monitor (1920x1080), DVI-Monitor (1920x1080), RJ-45 Network Cable
        CPU-Usage: 15-60%

        Removing the DVI monitor connection drops the cpu usage down to 0.7% (The system crashed after disconnecting the cable, but that's another bug, I guess).

        Please fix this bug. Thanks.

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