I have an issue with constant HIGH CPU Usage immediately after fresh boot, no apps running.
CPU0 - CONSTANTLY at some combination which adds up to 100% However ... %CPU in list = between 0 & 20% ... "top" reports Zero 'zombies'
Tasks: 165 total, 1 running, 164 sleeping, 0 stopped, 0 zombie
Cpu0 : 50.0%us, 50.0%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 1.7%us, 1.0%sy, 0.0%ni, 97.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2055512k total, 1645712k used, 409800k free, 465680k buffers
Swap: 2086908k total, 0k used, 2086908k free, 888712k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1074 root 20 0 40488 18m 7800 S 3 0.9 3:39.51 Xorg
1745 owlsglob 20 0 245m 55m 25m S 2 2.8 3:49.67 compiz
14736 owlsglob 20 0 81228 14m 10m S 2 0.7 0:03.10 gnome-terminal
14802 owlsglob 20 0 2852 1184 892 R 1 0.1 0:03.95 top
29 root 20 0 0 0 0 S 0 0.0 0:12.10 kworker/1:1
1754 owlsglob 20 0 3716 792 660 S 0 0.0 0:04.59 syndaemon
1819 owlsglob 20 0 27192 10m 3084 S 0 0.5 0:09.76 python
1847 owlsglob 20 0 63524 5752 3308 S 0 0.3 1:13.09 hud-service
top - 06:03:47 up 1 day, 13:58, 2 users, load average: 0.16, 0.29, 0.34
Tasks: 170 total, 1 running, 169 sleeping, 0 stopped, 0 zombie
Cpu0 : 80.6%us, 19.4%sy, 0.0%ni, 0.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu1 : 6.9%us, 1.0%sy, 0.0%ni, 92.1%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 2055512k total, 1039472k used, 1016040k free, 102308k buffers
Swap: 2086908k total, 194356k used, 1892552k free, 538256k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1744 owlsglob 20 0 287m 34m 17m S 8 1.7 16:54.45 compiz
13997 owlsglob 20 0 81804 14m 10m S 6 0.7 0:02.30 gnome-terminal
1063 root 20 0 66408 28m 10m S 6 1.4 21:58.16 Xorg
14060 owlsglob 20 0 2852 1276 980 R 1 0.1 0:02.64 top
495 syslog 20 0 31064 884 716 S 0 0.0 0:05.21 rsyslogd
Note: This problem began only after a complete reinstall of 12.04 but I noticed this following the installation and de-installation of both ClamAV & Comodo.
Attempts to solve the problem:
- Scoured "AskUbuntu" and "Ubuntu One"
- Biggest 'attempt': Changing NVidia:
Read:
Installing Nvidia:
- did NOT solve the problem
- totally messed up display properties
- large, unchangeable icons
- not recognising / could not access my XP partitions
- Software Centre "removal" made no improvement
- Synaptic: removed nvidia-304, nvidia-common, nvidia-settings, nvidia-settings-304
- restart restored previous 'unity' settings
- Considered investigating Xorg:
- some links suggest that Xorg is no longer a part of Precise, however it's present on my machine
Question: Would adjusting Xorg.conf help to solve the high CPU usage?
- One post suggests that 'apt-get' might be running in the background ...
Question: Could a program be running in the background, without "top" detecting it?
- "CPU 100% - Phantom Usage"
It might be a zombie process, but ... top
says 'zero zombies'
System:
- Toshiba NB200 Intel Atom CPU N280 @ 1.66GHz x 2
- Graphics - Unknown,
- OS 32-bit
- Disk 16.8 GB
- Ubuntu 12.04 LTS
sudo apt-get mesa-utils
then runglxinfo | more
You are hoping (in the first couple of pages) not to see lines about using lvmmpipem but instead to see something likeOpenGL renderer string: Mesa DRI Intel(R) Ivybridge Mobile
sudo apt-get install mesa-utils
.