LMDE MATE 64bit slows down dramatically

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LMDE MATE 64bit slows down dramatically

Postby Conni on Sun Jun 15, 2014 2:58 pm

The problem

After surfing the internet sooner or later my computer (LMDE Mate 64bit) is gonna slow down. It's a systematic slowdown. The Blowfish Benchmark (hardinfo) is for instance usually roughly 4 on my computer, after slowing down it is roughly 10. Other Benchmarks are worsening at a similar ratio. The system is still usable, but a bit sluggish.

Workaround

Currently the only workaround in order to reestablish the normal performance is a reboot. Logging out and logging in does not change anything.

Other experiments

I tried different web browsers (Firefox 29, Firefox 30, Midori 0.4.3), the problem occured with all three browsers.

Diagnosis

I checked the list of processes with the task manager in the normal state (after booting) and after slowing down. There are no additional processes. If I am trying to exhaust the CPU up to the limit, it simply does not happen after the computer has slown down. Although the task manager displays 100% CPU, the displayed CPU temperature (MATE Sensors Applet) is roughly 10 degrees (Celsius) below the normal limit (which is 64 degrees Celsius), and the CPU fan is not as loud as usual.

After slowing down I have still
Code: Select all
$ ulimit
unlimited


I also compared the output of sysctl -a in the normal state and after slowing down. Theses are the differences, there are not many:

Before slowing down:
Code: Select all
$ sysctl -a
fs.dentry-state = 23062   17232   45   0   0   0
fs.file-nr = 4736   0   544438
fs.inode-nr = 13102   419
fs.inode-state = 13102   419   0   0   0   0   0
kernel.random.boot_id = c4569da5-fd0e-4768-babb-ebb17fe97c75
kernel.random.entropy_avail = 133
kernel.random.uuid = 99ad5d06-34d5-4d78-a47a-cd5e2155181b
net.ipv4.tcp_fastopen_key = e6171192-72cfad59-17144c94-a5df7b10


After slowing down:
Code: Select all
$ sysctl -a
fs.dentry-state = 25901   19985   45   0   0   0
fs.file-nr = 5088   0   544438
fs.inode-nr = 15331   419
fs.inode-state = 15331   419   0   0   0   0   0
kernel.random.boot_id = b6323cc9-1ff7-432d-9ba8-7d6458d5dd2e
kernel.random.entropy_avail = 148
kernel.random.uuid = e0b1db33-2451-4d11-a96b-803b0b30884d
net.ipv4.tcp_fastopen_key = 216ba46c-eb96141e-63c15ba6-cd7810c0


I am not sure, if theses differences are of any relevance.

I would be very grateful for any hint.
Desktop: Lenovo H515s, AMD A6-5200 , 6 GB RAM
Laptop: Lenovo Thinkpad Edge E145, AMD E1-2500, 4 GB RAM
Conni
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Re: LMDE MATE 64bit slows down dramatically

Postby Swansen on Mon Jun 30, 2014 11:11 am

yep, i'm having the same exact issue but on cinnamon. I've used various distros and even vanilla debian and this has only happened with LMDE so far.
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Re: LMDE MATE 64bit slows down dramatically

Postby Conni on Mon Jun 30, 2014 5:02 pm

Under Lubuntu 14.04, which I had also on my desktop (as a dualboot OS besides LMDE) the problem occurred too, especially after watching videos. Maybe it is simply the newer kernel. I don't know, but especially during the FIFA World Cup I found the issue pretty annoying.

The problem never occurred with Antergos on my laptop. Finally I migrated my desktop to Antergos Mate, where the problem never occurred.
Desktop: Lenovo H515s, AMD A6-5200 , 6 GB RAM
Laptop: Lenovo Thinkpad Edge E145, AMD E1-2500, 4 GB RAM
Conni
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Re: LMDE MATE 64bit slows down dramatically

Postby Swansen on Sat Jul 12, 2014 5:07 pm

just a note, i was using cinnamon, but, i installed and have been using KDE and i don't have the slowdown issue anymore. i would also get laggy flash playback but don't get that anymore. as well as issues with chrome and tabs switching for no reason(at least the 'window' would, ie, the view would be of a different tab that was actually on). As well as some weird artifacts with the taskbar and various things. all gone when i started using KDE(which i prefer anywho). i dunno..
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