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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 →

    3 comments

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      • 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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