Xorg uses too much CPU at system boot

Asked by Rich Art on 2017-03-19

When I boot the laptop I can see that Xorg is using around 50% of CPU resources. So, I think it slows down the whole system. The work around I found is to disconnect and reconnect the wifi.

I was just about to submit this as a bug via "apport-bug xorg" but then the website asked me to check first if it is a bug via this support question.

So my question is: Is this a bug? How can we determine if it is a bug?

Please let me know if you need any further information.


Question information

English Edit question
Ubuntu Edit question
No assignee Edit question
Last query:
Last reply:

This question was reopened

What is the output of:

sudo lshw -C display; lsb_release -a; uname -a; apt-cache policy xorg


Rich Art (riccardo-patane-ch) said : #2

Thank you for your answer. Here are the outputs:

sudo lshw -C display
       description: VGA compatible controller
       product: 2nd Generation Core Processor Family Integrated Graphics Controller
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 09
       width: 64 bits
       clock: 33MHz
       capabilities: msi pm vga_controller bus_master cap_list rom
       configuration: driver=i915 latency=0
       resources: irq:27 memory:c2000000-c23fffff memory:b0000000-bfffffff ioport:4000(size=64) memory:c0000-dffff

lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.2 LTS
Release: 16.04
Codename: xenial

uname -a
Linux dev-pc 4.8.0-41-generic #44~16.04.1-Ubuntu SMP Fri Mar 3 17:11:16 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

apt-cache policy xorg
  Installed: 1:7.7+13ubuntu3
  Candidate: 1:7.7+13ubuntu3
  Version table:
 *** 1:7.7+13ubuntu3 500
        500 http://us.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
        100 /var/lib/dpkg/status


Rich Art (riccardo-patane-ch) said : #4

Hi, that worked! :-)
Thank you very much.

Rich Art (riccardo-patane-ch) said : #5

Thanks actionparsnip, that solved my question.

Rich Art (riccardo-patane-ch) said : #6

Dear community, dear Andrew,

I reopened this issur because unfortunately it is still not solved. When I installed the Intell grafics tool for Linux, I installed the new drives and I immediadley restarted the system, it seamed the problem to be solved. But the second time I booted the laptop it was again like before. So, I observed the behaviour for 6 days now and the problem persists.

When I boot my computer there are mainly 2 processes that use most of CPU: Dropbox and Xorg. I have 2 CPUs and as long as Dropbox do the system-start-sync job it uses about 50-60% of overall CPU resources. Xorg uses about 10-20% during the same time. Then, as soon as Dropbox is done, Xorg rises CPU utilization to 25-45%. Sometimes it drops to 0-5% and immmediatly comes up to 25-45% again. I observe this behavior with the built in Ubuntu System Monitor.

Again: the workaround I found is to disconnect and reconnect the WiFi. This causes Xorg to stop and disapear from the active processes list of the System Monitor.

But, I guess this shouldn't be the default behavior. Please help me to solve this problem. I am software engineer and will be very happy to try to fix this problem with your help.

Thank you guys.

Can you help with this problem?

Provide an answer of your own, or ask Rich Art for more information if necessary.

To post a message you must log in.