Ubuntu

Max cpu usage upon start up untill wifi disabled

Asked by Robert Claudio

I have a Toshiba Satellite C855D laptop on which I'm running Ubuntu 16.04 LTS. Fresh install. When I boot it up, its takes a long while to boot. Once it does boot up, I open the system monitor utility, which shows me that both cores of my CPU are running at 100%. I have no open programs running at this time except the system monitor utility. But when I disable the wi fi, the cpu's drop back down to the 10-20% range. I can then turn the wi fi back on with no drop in performance. I can't figure out why it's doing that. I did a virus scan using the ClamTK utility Ubuntu offers from its repository, but it finds nothing. Can anyone help me out with this?

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Manfred Hampl (m-hampl) said : 		#1

Which process(es) use(s) so much CPU? (e.g. using the command "top")
Which processor architecture, kernel version, etc.? (e.g. using the command uname -a)

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Robert Claudio (robertclaudio2017) said : 		#2

Well, when I open a terminal upon start up, which takes a good two or three mintutes, the top utility tells tells me gnome-screen shot is using 17%,(I used it to capture the info, the processes' were changing so quickly I couldn't settle on what was using or how much). Next in order as follows:
-compiz at 11.1, user robert
-Xorg at 6.2, user root
-gnome-terminal at 5.6, user robert
-systemd at 4.9, user root
-dbus-daemon at 3.3, user message+
-polkitd at 3.3, user root
-ibus-daemon at 2.3, robert
-NetworkMan+ at 1.6, user root

the rest were at 1 or less.

Some other users of the rest of the processors included lightdm, using the systdm process at 1.6 %.

Does this info help out any?

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Robert Claudio (robertclaudio2017) said : 		#3

My processor is an AMD A6-4400M APU with Radeon(tm) HD Graphics x2. My laptop is using a 64 bit OS with 3.3GiB of RAM. Graphics is using AMD ARUBA (DRM 2.50.0 / 4.13.0-32-generic, LLVM 5.0.0)

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actionparsnip (andrew-woodhead666) said : 		#4

If you install lxde and log off, then log into the LXDE session is it OK?

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Robert Claudio (robertclaudio2017) said : 		#5

I don't think it has anything to do with the desktop. My computer will run at 100% cpu usage until I disable the wi fi. Immediately after my cpu usage will drop down to around 10% usage. It'll stay at that level even when I turn my wi fi back on. No more drop in performance. I connect to the internet through a wi fi modem at home. Spectrum is my ISP. It has to be something with the network connection, doesn't it?

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Manfred Hampl (m-hampl) said : 		#6

The processes that show high CPU in your recent output are not related to WLAN, but to the display system (compiz, Xorg, ...).

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Robert Claudio (robertclaudio2017) said : 		#7

I can see that. But their usage doesn't seem to add up to anywhere near 100%. And if the display system is the root, why does turning off the wi fi correct the problem? Why doesn't it act up again when I turn the wi fi on again?

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Manfred Hampl (m-hampl) said : 		#8

actionparsnip's advice to test with lxde is just another step in trying to find the cause of your problem.

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actionparsnip (andrew-woodhead666) said : 		#9

Try a newer kernel
http://ubuntuhandbook.org/index.php/2017/11/install-linux-kernel-4-14-ubuntu-linux-mint/

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Robert Claudio (robertclaudio2017) said : 		#10

ok let me give it a shot.

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