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#1 2010-06-10 22:46:31

fusionlord
Member
Registered: 2009-09-29
Posts: 9

Screen shaking/ wobbling [SOLVED -ish]

I don't know why, but for some reason my screen just suddenly starts shaking,
but when I change the resolution, then change it back, it's okay again.
It appears to happen at random because sometimes it happens before I login,
sometimes after I login, and sometimes it doesn't happen at all, but when it does happen, it's really annoying.

I don't think this is a problem with Xorg because it happens in the terminal too.

Does anyone have any idea what's happening?

Thanks in advance

Last edited by fusionlord (2010-06-12 00:17:44)

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#2 2010-06-10 22:57:29

ataraxia
Member
From: Pittsburgh
Registered: 2007-05-06
Posts: 1,553

Re: Screen shaking/ wobbling [SOLVED -ish]

I used to see this on CRTs when there was electromagnetic interference pulling the beam off-target. A fan next to the screen would do it very reliably.

It's weird to see this on an LCD, though.

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#3 2010-06-10 23:40:47

jmad980
Member
From: Califonia
Registered: 2010-03-11
Posts: 54

Re: Screen shaking/ wobbling [SOLVED -ish]

I think I've had that problem before, at that time I hadn't had my laptop cleaned out. You might want to make sure your computer isn't overheating, which I think may have caused my problem previously


Someone call a doctor, my awesome configuration broke again! || To err is human -- to blame it on a computer is even more so.

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#4 2010-06-10 23:43:46

egan
Member
From: Mountain View, CA
Registered: 2009-08-17
Posts: 273

Re: Screen shaking/ wobbling [SOLVED -ish]

What graphics card are you on? Are you using KMS?

Last edited by egan (2010-06-10 23:44:01)

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#5 2010-06-10 23:54:04

fusionlord
Member
Registered: 2009-09-29
Posts: 9

Re: Screen shaking/ wobbling [SOLVED -ish]

jmad980 wrote:

I think I've had that problem before, at that time I hadn't had my laptop cleaned out. You might want to make sure your computer isn't overheating, which I think may have caused my problem previously

I don't think my computer is overheating -- it is running pretty coolly, and I've run it in way hotter times without problems.
Also, for some reason, this only happens in Arch (not Windows, not Mint, not Fedora).

egan wrote:

What graphics card are you on? Are you using KMS?

I'm using an ATI integrated graphics (forgot what series though) and I do not know what is KMS.

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#6 2010-06-11 13:34:02

kaizoku
Member
Registered: 2009-01-09
Posts: 62

Re: Screen shaking/ wobbling [SOLVED -ish]

Are you using CRT monitor? Try degauss it.

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#7 2010-06-11 15:11:03

perbh
Member
From: Republic of Texas
Registered: 2005-03-04
Posts: 765

Re: Screen shaking/ wobbling [SOLVED -ish]

Or disable wobbly windows on compiz ...?
(sorry, just kidding - couldn't help myself)

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#8 2010-06-11 15:36:25

egan
Member
From: Mountain View, CA
Registered: 2009-08-17
Posts: 273

Re: Screen shaking/ wobbling [SOLVED -ish]

I don't quite understand what you mean by your screen is shaking...

KMS = Kernel Mode Setting. If you aren't using another driver, and you have hi-res TTYs then you are most likely using it, since it has been enabled by default in the last few kernels.

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#9 2010-06-11 21:21:52

fusionlord
Member
Registered: 2009-09-29
Posts: 9

Re: Screen shaking/ wobbling [SOLVED -ish]

kaizoku wrote:

Are you using CRT monitor? Try degauss it.

Nope, I'm using an LCD.

egan wrote:

I don't quite understand what you mean by your screen is shaking...

KMS = Kernel Mode Setting. If you aren't using another driver, and you have hi-res TTYs then you are most likely using it, since it has been enabled by default in the last few kernels.

Yeah, then I think I am using KMS.

And by shaking, I mean the image gets a bit shifted, the edges are wobbly, and image shakes. It's almost like viewing PAL content on a NTSC TV. It's somewhat hard to describe.

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#10 2010-06-11 23:25:44

egan
Member
From: Mountain View, CA
Registered: 2009-08-17
Posts: 273

Re: Screen shaking/ wobbling [SOLVED -ish]

Then it looks like you have the same problem as I do:
http://bbs.archlinux.org/viewtopic.php?id=96426
I have a graphic there that should help people see what is going on.

The work around I do is to blank the screen, which fixes it just as you are with resolution change.
sleep 1; xset s activate

If you have nothing against a regular X driver, you can always disable KMS. I find KMS to be mostly superior though, except for this annoying problem.

Last edited by egan (2010-06-11 23:28:06)

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#11 2010-06-12 00:17:17

fusionlord
Member
Registered: 2009-09-29
Posts: 9

Re: Screen shaking/ wobbling [SOLVED -ish]

Thanks for your help, but since it is happening almost startup now, it's just too much of a hassle to run that command every time, so I've just disabled KMS. I really hope KMS gets mature enough to use in the future.

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#12 2010-06-12 01:09:39

Stebalien
Member
Registered: 2010-04-27
Posts: 1,237
Website

Re: Screen shaking/ wobbling [SOLVED -ish]

You can add that command to /etc/rc.local to have it run on boot.


Steven [ web : git ]
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Do not email: honeypot@stebalien.com

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#13 2010-07-04 17:27:52

egan
Member
From: Mountain View, CA
Registered: 2009-08-17
Posts: 273

Re: Screen shaking/ wobbling [SOLVED -ish]

With the latest Xorg and Kernel, I haven't encountered this problem at all --- seems to be fixed.

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