[Solved] cpu usage 100%, it is bug of lxpanel

dlin · 2011-04-02 14:46:30

My archlinux is on an old PIII machine. Recently, I found its CPU usage is 100%.

But, I don't know how to solve it. I can not found out which is cpu eater.
vmstat is 0 idle, but on top view, there are a few process with lower cpu usage.

I've tried both kernel, both cause 100% cpu usage.

kernel26 2.6.37.5-1
kernel26-lts 2.6.32.36-1

# vmstat 2 10
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 0 0 103060 26496 227192 0 0 52 38 202 425 56 41 1 3
4 0 0 103300 26496 227196 0 0 0 0 192 439 54 47 0 0
1 0 0 103300 26496 227196 0 0 0 0 303 589 64 36 0 0
1 0 0 103316 26496 227196 0 0 0 0 367 656 64 37 0 0

# top - 22:37:53 up 52 min, 2 users, load average: 2.46, 1.87, 1.80
Tasks: 81 total, 2 running, 79 sleeping, 0 stopped, 0 zombie
Cpu(s): 57.9%us, 41.1%sy, 0.0%ni, 0.0%id, 0.0%wa, 1.0%hi, 0.0%si, 0.0%st
Mem: 495416k total, 385172k used, 110244k free, 25784k buffers
Swap: 0k total, 0k used, 0k free, 224916k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1152 root 20 0 70992 20m 5976 S 14.5 4.2 1:13.63 X
23680 dlin 20 0 109m 22m 13m S 7.2 4.6 1:43.47 chromium
1887 dlin 20 0 138m 12m 9848 S 6.9 2.6 0:12.89 lxterminal
1182 dlin 20 0 99848 11m 8904 S 3.9 2.3 2:42.20 lxpanel
1191 dlin 20 0 297m 43m 27m S 1.0 9.1 1:00.54 chromium
21399 dlin 20 0 4404 1144 888 R 0.7 0.2 0:00.02 menu-cache-gen
1 root 20 0 1712 608 548 S 0.3 0.1 0:17.09 init
4 root 20 0 0 0 0 S 0.3 0.0 0:02.20 ksoftirqd/0
419 root 20 0 0 0 0 D 0.3 0.0 0:02.82 usb-storage
1161 root 20 0 3648 1144 988 S 0.3 0.2 0:00.65 hald-addon-stor

Last edited by dlin (2011-04-02 16:38:08)

graysky · 2011-04-02 14:48:30

pacman -S htop

karol · 2011-04-02 16:05:35

dlin wrote:

Recently, I found its CPU usage is 100%.

How did you do it?

Edit:

# top - 22:37:53 up 52 min,  2 users,  load average: 2.46, 1.87, 1.80

Load avg doesn't look good. What have you been doing? Compiling, compressing?

Last edited by karol (2011-04-02 16:14:59)

dlin · 2011-04-02 16:22:07

karol wrote:

dlin wrote:
Recently, I found its CPU usage is 100%.
How did you do it?
Edit:
# top - 22:37:53 up 52 min,  2 users,  load average: 2.46, 1.87, 1.80
Load avg doesn't look good. What have you been doing? Compiling, compressing?

I use xorg,lxpanel,chromium, and just open a page for this forum.
No compressing, Compiling, you could see the top view.
Even I close the chromium, the load seems high.

karol · 2011-04-02 16:27:17

Well, top shows that %CPU is clearly below 100% so I thought maybe you've been doing some very cpu-intensive task and took the top-screenshot after you've finished.

Is e.g. the UI responsive? If yes, than it may be a bug that artificially inflated the load avg.

dlin · 2011-04-02 16:37:29

I've changed to kernel-ck, the problem still exist.
I turn off X11. It is OK.
I turn off lxpanel.

BINGO, it is the cpu eater.

It always show the following message.
** (process:15327): WARNING **: removed previous socket file /tmp/.menu-cached-:0-dlin

And it is caused by my $HOME/.cache directory is readonly.

Last edited by dlin (2011-04-03 08:49:05)

Edward.H · 2011-04-03 08:44:45

I got this problem with gnome3 ,but it solved after routine update.

manouchk · 2011-04-05 12:16:33

The problem is quite old (3 weeks old?) and bad (it eventually does freeze the computer if lxpanel is not killed). I still have the problem today. My last update was on first of april. Has it been fixed later? I will check update at night.

Last edited by manouchk (2011-04-05 12:22:38)

dlin · 2011-04-05 14:10:30

manouchk wrote:

The problem is quite old (3 weeks old?) and bad (it eventually does freeze the computer if lxpanel is not killed). I still have the problem today. My last update was on first of april. Has it been fixed later? I will check update at night.

Hi, do you mean you have the same problem as me?

My workaround solution is just create a $HOME/.cache directory, and make sure I have permission, it solve this problem.
I back to use lxpanel.

I don't response to lxpanel's author, so the bug still exist there.

manouchk · 2011-04-05 14:25:40

It seems that the problem occurs to me too! Could it be linked with libreoffice?

I think I have permission in ~/.cache directory:

ls -lh |grep .cache
drwxr-xr-x  2 manu manu 4,0K 29 mars   2010 cache

[11:21][manu@compal:~]$ ls -lh .cache
total 36K
drwx------ 2 manu manu 4,0K 19 oct.  15:56 dconf
-rw-r--r-- 1 manu manu  12K 14 mars  11:52 event-sound-cache.tdb.12c7aa4c6ede9c34246c65044a475d7e.i686-pc-linux-gnu
drwxr-xr-x 3 manu manu 4,0K 18 août   2010 geeqie
drwx------ 3 manu manu 4,0K 22 sept.  2010 gegl-0.1
drwxr-xr-x 2 manu manu 4,0K 12 sept.  2010 gogglesmm
drwx------ 2 manu manu 4,0K  1 avril 19:49 menus
drwx------ 3 manu manu 4,0K 11 déc.  18:42 vlc

[11:21][manu@compal:~]$ ls -lh .cache/menus
total 80K
-rw------- 1 manu manu 38K 23 nov.  19:24 26a80813bb7494e1d982502af748aef6
-rw------- 1 manu manu 38K  1 avril 19:49 757379b1865bb943a0541b554ffbb809

lxpanel is linked with .cache/menus directory?

I will try to delete .cache and see what happens!!

dlin · 2011-04-05 14:36:15

manual run lxpanel, do you have the similar output as mine?

** (process:15327): WARNING **: removed previous socket file /tmp/.menu-cached-:0-dlin

manouchk · 2011-04-05 16:03:00

No.
I just got the freezing of lxpanel right now and I didn't get any warning in the command line.

dlin · 2011-04-06 05:12:29

manouchk wrote:

No.
I just got the freezing of lxpanel right now and I didn't get any warning in the command line.

I guess you face different problem of mine.

So, you could try another panel program. Eg. fbpanel.
Or, you should try report the problem to lxpanel's author.

bamse · 2011-06-17 20:10:27

I've got the same issue with lxpanel. After some looking around, it seems that choosing "System theme" in the Background section of the Appearance tab in Panel Preferences causes this load. Don't ask me why.
What I can tell is that changing the setting to "Image" or "Solid color (with opacity)" solved the cpu problem for me.

Hope it helps someone.

Lone_Wolf · 2011-06-18 10:47:12

i use that setting, and have no cpu problems, so it's likely theme related .

Check which theme is set in lxappearance ('customize look and feel' in lxde menu', i am using clearlooks theme.

Arch Linux

#1 2011-04-02 14:46:30

[Solved] cpu usage 100%, it is bug of lxpanel

#2 2011-04-02 14:48:30

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#3 2011-04-02 16:05:35

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#4 2011-04-02 16:22:07

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#5 2011-04-02 16:27:17

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#6 2011-04-02 16:37:29

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#7 2011-04-03 08:44:45

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#8 2011-04-05 12:16:33

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#9 2011-04-05 14:10:30

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#10 2011-04-05 14:25:40

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#11 2011-04-05 14:36:15

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#12 2011-04-05 16:03:00

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#13 2011-04-06 05:12:29

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#14 2011-06-17 20:10:27

Re: [Solved] cpu usage 100%, it is bug of lxpanel

#15 2011-06-18 10:47:12

Re: [Solved] cpu usage 100%, it is bug of lxpanel

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