SYSTEM STUTTERING

SYSTEM STUTTERING

[Raghav Gururajan]

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Hello Folks!

This is issue is been there on my system for very long time. It started
right after last core-updates <--> master merge. I waited to till now
to see if any updates fixes it, but no luck. :(

50% of the time, when I am playing videos in mpv or icecat or
ungoogled-chromium, after 5-10min, the whole system starts to stutter.
I can see stutter in/while video, switching windows, changing
volume+brigness on the panel etc.

I thought there is something wrong with hardware. But I do not face the
issue when running Trisquel or Hyperbola.

Could anyone help me with further digging this issue and fixing it
please?

DEVICE MODEL: X200-Tablet

Regards,
RG.

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Re: SYSTEM STUTTERING

[Pierre Neidhardt]

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Are you running Guix System?

If so, try using an older kernel, this could be your issue.
If not the kernel, it could be something related to the video stack,
e.g. Mesa.  If you still have some generations at hand, try bisecting
which generation is at fault.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: SYSTEM STUTTERING

[Jelle Licht]

Dear Raghav,

Raghav Gururajan <raghavgururajan@disroot.org> writes:

> Hello Folks!
> [...snip...]
> 50% of the time, when I am playing videos in mpv or icecat or
> ungoogled-chromium, after 5-10min, the whole system starts to stutter.
> I can see stutter in/while video, switching windows, changing
> volume+brigness on the panel etc.
> [...snip...]
> Could anyone help me with further digging this issue and fixing it
> please?
>
> DEVICE MODEL: X200-Tablet

AFAIK, that device has an Intel iGPU. Are you running the latest version
of linux-libre? I believe and have experienced quite some regressions
using Linux-libre kernel since ~5.3 on my T400. If you are not running
the latest linux-libre, it might still make sense to see whether `dmesg'
tells you something relevant.

Regards,
Jelle

Re: SYSTEM STUTTERING

[Raghav Gururajan]

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Hello Pierre!

> Are you running Guix System?
> 
> If so, try using an older kernel, this could be your issue.
> If not the kernel, it could be something related to the video stack,
> e.g. Mesa.  If you still have some generations at hand, try bisecting
> which generation is at fault.

So I shifted my kernel to version 4.9. I still face the same issues.
But if something is wrong with mesa, what should I do? There is only
one version available in guix.

Regards,
RG.

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Re: SYSTEM STUTTERING

[Raghav Gururajan]

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Hello Jelle!

> AFAIK, that device has an Intel iGPU. Are you running the latest
> version
> of linux-libre? I believe and have experienced quite some regressions
> using Linux-libre kernel since ~5.3 on my T400. If you are not
> running
> the latest linux-libre, it might still make sense to see whether
> `dmesg'
> tells you something relevant.

So I shifted my kernel from 5.3 to version 4.9. I still face the same
issues. :(

Regards,
RG.

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Re: SYSTEM STUTTERING

[ison]

I had a similar problem a while back which caused me to switch to
Wayland, at least to wait until the problem went away. Once I made the
switch I no longer had stuttering on the entire desktop, but it still
happens in some games.
For example there is no stuttering in Minetest, but there is stuttering
in Xonotic.

In my attempts to track down the cause I've seen some bug reports
concerning recent versions of SDL which attempts to do something like
enumerate joystick devices every 3 seconds and causes a mini freeze.

Does your stuttering occur at regular intervals around 3 seconds as
well? If not then maybe this is unrelated to your issue.

If it is the same issue then I recently found a temporary workaround
which is to re-write packages and their dependencies to use SDL version
2.0.8.

Re: SYSTEM STUTTERING

[Pierre Neidhardt]

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You can use `guix time-machine' to use install an older version of Mesa.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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Re: SYSTEM STUTTERING

[Raghav Gururajan]

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Hello Ison!

> I had a similar problem a while back which caused me to switch to
> Wayland, at least to wait until the problem went away. Once I made
> the
> switch I no longer had stuttering on the entire desktop, but it still
> happens in some games.
> For example there is no stuttering in Minetest, but there is
> stuttering
> in Xonotic.
> 
> In my attempts to track down the cause I've seen some bug reports
> concerning recent versions of SDL which attempts to do something like
> enumerate joystick devices every 3 seconds and causes a mini freeze.
> 
> Does your stuttering occur at regular intervals around 3 seconds as
> well? If not then maybe this is unrelated to your issue.
> 
> If it is the same issue then I recently found a temporary workaround
> which is to re-write packages and their dependencies to use SDL
> version
> 2.0.8.

Thanks for your email. I do not think I have the same issue. :-)

Regards,
RG.

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Re: SYSTEM STUTTERING

[Raghav Gururajan]

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Hello Pierre!

I narrowed down the issue.

So I tried logging in as i3-wm session and streamed/played videos, the
video+desktop stuttering did not occur. This is the case with both of
linux-libre versions 4.9 and 5.3.

But when I login as gnome session and try to stream/play videos, the
video+desktop stuttering occurs. This is the case with both of linux-
libre version 4.9 and 5.3.

So the problem seems to be with gnome. What should I do?

Regards,
RG.

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Re: SYSTEM STUTTERING

[Pierre Neidhardt]

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Try to narrow down the GNOME version, supposing that your previous GNOME
was not suffering from this issue.

Then report the bug with as much information as you can to Guix.  You should
probably report to the GNOME project as well.

-- 
Pierre Neidhardt
https://ambrevar.xyz/

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