i8kmon causes lag on Dell Inspiron 7720

[vitorafsr]

My CPU keeps overheating from time to time... the fan gear up and slow down in cycles and the lag makes the machine unusable, it's worst when I'm using Firefox to watch some Flash video (using the HTML5 player), but the problem also occurs when nothing special is running. During the lag htop doesn't show any process using all CPU capacity.
When I stop "sudo service i8kmon stop" and "sudo i8kfan 2 2" I get "-1 2" and everything goes back to normal.

My machine is a Dell Inspiron 17R SE 7720, with an GT650M video card (Optimus technology) that I'm using with Prime+nouveau.

Please let me know if any other information can be useful.

--
The above description was extracted from bug report #1349176. The problem persists even after testing lastest version from release 1.42.

[postadelmaga (postadelmaga)]

same problem on 14.10 it arrise also when I read fan speed and when I change the fan speed for ex `watch i8kctl fan - 2` reproduce the lag issue
`

[postadelmaga (postadelmaga)]

I just tested the last version `i8kutils-1.42-45` unfortunately I still face same lag issue

[postadelmaga (postadelmaga)]

Same bug as https://bugs.launchpad.net/i8kutils/+bug/1179282 ( I have posted some info/workaround there )

[António Miranda (abfm90)]

Lag over here on Dell XPS 9333, latest bios.

[Marcin Sągol (soee)]

Same here on Wily (15.10).

[Pierr0t (pierre-godicheau)]

saame with Dell Vostro 3360
You can easly reproduce with an infinite loop like:

#!/bin/bash

while true;do
    cat /proc/i8k
    sleep 2
done

[Pierr0t (pierre-godicheau)]

Reproduced with Ubuntu 14.04 on Dell Vostro 3360
You can easly reproduce with the attached script

[Petar Bojovic (petar-bojovic-paxy)]

Same issue with Dell Inspiron N7110, lag on cat /proc/i8k

[vitorafsr (vitorafsr)]

Is the freeze still happening, even with latest i8kutils 1.43?

[Pierr0t (pierre-godicheau)]

Hello,

thanks for your reply. Unfortunately, I do not have any more this laptop.
I can't test it for you.
Thanks for your work, anyway.

Best regards

2017-04-12 2:32 GMT+02:00 vitorafsr <email address hidden>:

> Is the freeze still happening, even with latest i8kutils 1.43?
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/1405003
>
> Title:
> i8kmon causes lag on Dell Inspiron 7720
>
> Status in i8kutils:
> Confirmed
>
> Bug description:
> My CPU keeps overheating from time to time... the fan gear up and slow
> down in cycles and the lag makes the machine unusable, it's worst when I'm
> using Firefox to watch some Flash video (using the HTML5 player), but the
> problem also occurs when nothing special is running. During the lag htop
> doesn't show any process using all CPU capacity.
> When I stop "sudo service i8kmon stop" and "sudo i8kfan 2 2" I get "-1
> 2" and everything goes back to normal.
>
> My machine is a Dell Inspiron 17R SE 7720, with an GT650M video card
> (Optimus technology) that I'm using with Prime+nouveau.
>
> Please let me know if any other information can be useful.
>
> --
> The above description was extracted from bug report #1349176. The
> problem persists even after testing lastest version from release 1.42.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/i8kutils/+bug/1405003/+subscriptions
>

[Marcel Henrique Bertonzzin (marcelhb)]

Same here... changed my laptop some time ago... =/