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.


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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.

Launchpad Janitor (janitor) said : #7

This question was expired because it remained in the 'Open' state without activity for the last 15 days.