Originally Posted by oldskool75
After searching for every keyword and most combinations above, I couldn't find an exact conclusive solution to what I've experienced.. although some portions yes..
Originally, I hooked up my pc with an ATI x850 XT vid card to the hls5687w.. Some weird stuff started happening.. (unfortunately, I was kind of 'noobish' with my tv, and so a lot of opportunity to write down info didn't occur to me back then.
X850 XT with a vga cable - 1920x1080@60Hz...
Originally, ran at full 1080p (1920x1080@60Hz) with no overscan/underscan (minus perhaps the unavoidable physical overscanning). I didn't change a single setting. But then one day I saw that thread with the 'achieve 1:1 pixel mapping with powerstrip'.. Not exactly realizing that I already had that, I downloaded powerstrip and fired it up. That's when everything fell apart. After some 'tweaking', boom, everytime I went to 1920x1080, it was overscanning HUGE (like, a panning virtual desktop, where my window frame was less than 1/6 the entire screen). I could never recover from this.
X850 XT with dvi->hdmi cable - 1920x1080@60Hz
Reading that the hdmi cable should, in theory, fix my problems, I tried this. Unfortunately, I had massive 'underscan' (if that is a real term). Basically, though the PC is driving at 1920x1080, it was only taking up about 2/3 the width of the screen! (looked like SD at this point, but everything squished). I never found a solution to others who've asked about the same scenario..
I eventually gave up and ran my res at 1280x720, which ran flawlessly in vga mode, edge to edge. So I just left it like that after learning from my first mistake. Anyway, my pc wasn't fast enough to play 1080p downloaded content, so 720p was just fine.
Enter the new HTPC system..
(q6600 quad-core 2.4GHz o/c to 3GHz, with a Blu-Ray/HD-DVD ROM player, and ATI HD2600 XT (for BD/HD hw acceleration, and (eventually) downloaded content hw acceleration) .
2600XT - vga - 1280x720
Still works perfectly fine
2600XT - vga - 1920x1080
FIRST time I tried this, I had major overscanning again (like a virtual panning desktop).
SECOND time, I had major 'underscan'.. Again, black borders on each left&right sides of the image, with the image squished/compressed. See attached image.. (sorry, I was in a rush to snap the pic so lighting is horrible.. I highlighted where the corners of the screen *should* approximately be).
While in this current 'underscan' mode, I went into SM, and checked that Overscan is infact 'on'.
Why would my screen be squished at 1920x1080 (as opposed to overscan)? And how can I fix this...?
Is there any powerstrip timings/settings someone can help me out with here that could fix this? The most I could do is stretch it out by 1cm/0.5in using the ati ccc..
I haven't had a chance to try the dvi->hdmi cable yet, but I really want to see this work in vga mode first anyway.
*edit* Errr.. that is, see it work without changing the resolution to something like 1864 x 1046.. I didn't seem to need to do this before..
(and it seems that resolution was to fix an overscan issue, not a compressed/squished image issue)