Blurry Display (Panasonic TC-L42E60)

[Felix Miata]

On 2013-07-08 16:19 (GMT-0400) Steven Blatchford composed:

> At work I'm trying to setup a Panasonic TV (TC-L42E60) to be used as a
> monitor with a laptop (ThinkPad x220). I've turned off 'overscan' and
> the picture fits but it is still blurry.

> I've plugged the HDMI cable into an older 42" TV we have here and the
> picture is clear.  The only difference between two TV's, that I've
> found so far, is in the output of xrandr.

> New TV:
> HDMI2 connected 1920x1080+0+0 (normal left inverted right x axis y axis)
> 698mm x 392mm

> Old TV:
> HDMI2 connected 1920x1080+0+0 (normal left inverted right x axis y axis)
> 930mm x 520mm

> 698mm x 392mm is closer to a 32" monitor.  After attemping to set the
> displaysize to 930mm x 520mm (42") someone in the IRC channel suggested
> this was a red herring.

> Any ideas why the display would be blurry?

The ideas that come to top of my mind are inconsistent with your xrandr 
excerpts. :-( Your laptop screen is 1366x768, right?

Swapping between that and 1920x1080 can be problematic. Which DE are you 
running at what version?

What do Firefox or SeaMonkey report if you open 
http://fm.no-ip.com/Auth/dpi-screen-window.html ? Does what either report 
make sense to you?

Does 'xrdb -query | grep dpi' report anything? If so, what?

Do xdpyinfo resolution and dpi match xrandr output?

If KDE or TDE, does Xserver report in KInfoCenter match xrdb, xdpyinfo and 
xrandr?

Maybe you should upload Xorg.0.log from using each of the three displays so 
we can compare?

The new TV may have defective EDID. Does its behavior change between 
connecting it after boot and X startup, or before?
-- 
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