Re: xrandr laptop monitor flickering

[Franklin PIAT <fpiat@bigfoot.com>]

Ivan,

On Wed, 2008-02-27 at 12:34 +0100, Ivan Glushkov wrote:
> I use my laptop monitor (1280x800@60), and an external Samsung
> SyncMaster 740T (1280x1024@75) connected via VGA to the laptop. The
> configuration is:

> Issuing:
> ~ % xrandr --output VGA-0 --above LVDS --mode 1280x1024 --rate 75

> ..that the lower part of my laptop screen starts flickering
> once per 10-15 seconds.

Have you tried without specifying "--rate 75" ?

Since LCD pixels remains "on" (or "off") all the time (as opposed to CRT
were pixel brightness was fading in a few milliseconds), there's no need
for high refresh rate (i.e. how often the image is actually changed, so
you eye perceive a motion). The default (60hz) ought to be just fine.

(Of course, have a good response time is useful, to avoid blur effect,
but that's another story).

Franklin