Custom Resolution Utility (CRU)

[freeflow]

(12-04-2016 11:38 PM)ToastyX Wrote:  

(12-04-2016 04:01 PM)freeflow Wrote:  Using v1.3, Intel HD4000 and a Del U2713HM monitor I can set the graphics resolution to 2560x1440 @ 29 hz refresh rate using VGA. However the display is compressed with about 1/4 of the right of the screen being black(the full 2560x1440 is compressed in the other 3/4 screen).

I have previously had a different laptop with Intel HD3000 driving the same monitor through VGA at2560x1440@29HZ without problems.

I've tried tweaking the various parameters but this does not seem to make any difference to the compression.

The Intel custom resolution utility produces exactly the same effect.

Are you saying EDID overrides work with Intel now? Why are you adding 29 Hz? VGA should be able to do 2560x1440 @ 60 Hz. What timing parameters did you try? Did you try the "LCD standard" and "LCD native" timing options? Did you try the same timing parameters with the Intel control panel? Does the monitor have clock/phase adjustments for VGA?

If the laptop has DisplayPort 1.2, you might have better luck using a DisplayPort hub to connect both monitors.

Your Display Port hub suggestion sounds like the way to go.

I work from home a couple of days a week. The laptop is provided by the company I work for. At work the monitors are 1600x1200 and work with no issues. At home I use my own monitors which are Del U2713HM with a 2560x1440 native resolution. I'm trying to do something I think should be quite simple as work IT can't support my home monitors. It also means I can't install any software such as CRU without going through IT first.

I can get 20148x1152 at 60hz no problem on the Dell monitors but this is slightly fuzzy on a 2560x1440 native resolution. I'm fussy enough to want to get the native resolution.

I can't use the cru utility to make any changes to the screen resolution as the registry is locked down. But I can use the Intel custom resolution utility. Hence I was using cru to find out what the settings for specific screen resolutions were so I could transfer them to the Intel utility.

The U2713HM are monitors from hell. For custom VGA they don't seems to support a bandwidth greater than 150 mhz. 2560x1440 at upto 39 hz refresh rate works but not 40 and above.

Given that I only work with text documents refresh rates below 40 hz are perfectly OK.

So my curiosity lies mainly in asking why the resolution is compressed horizontally. IMHO this is a windows thing as it doesn't seem to matter what I use for front porch, back parch, sync timings etc, provided I don't exceed a bandwidth of 150 MHz I get a 2560x1440 display but with the same appearance, the rightmost edge of the display appears about 3/4 across the screen.

The hub is ordered as it will be useful to have irrespective of the current problems, but it would be good to understand why I'm having my current issue/