yeah, some monitors work fine, some refuse to offer more than 2-3 resolutions.
I was previously using a standard 1080 Widescreen monitor with my Quicksilver, but the available resolutions were always letterbox margined or they they didn't look right. 1920x1080 wasn't available as an option from the computer. the monitor's control panel allowed a stretched option, which would fill the screen, but never quite looked right because of the stretching and aliasing (or whatever term you want to use there), but some resolutions almost looked decent.
Finally bought a 1920X1200 monitor since that is the max res that the geforce card in the QS outputs. And funny, it now also allows me the option of outputting in 1080, but it also doesn't look right with the ratio of the screen! Go figure!
Plus, this new monitor's control panel options from the settings button on the monitor itself has an aspect ratio setting, but in my fiddling with it, I didn't see that it made much of a difference with the available resolutions.
Also, once or twice I blacked the screen out because a res option that was allegedly usable according to the Monitors control panel wasn't liked by the actual monitor! I went through some heck trying to get away from the bad resolution setting so I could actually use it without booting into extensions-off mode. Resetting PRAM didn't work, at least the first time round, which I kinda thought was the thing to do. I hooked up another monitor that didn't have such issues and reset the resolution from there, in that instance, though I think I found another workable solution at a later date. As in, it actually let me stay in 640x480 when I rebooted. Hard to remember, it only happened a few times and I am not excited about going through that again, so I haven't really experimented with it much!
Isn't resetting PRAM supposed to clear some of those control panel settings?
Also, something I mentioned in a previous post. Had a CRT display many years ago that had manual vert/horizontal stretching, and I also have an HD TV that allows that, which would probably be a nice option for those weird random resolutions that don't quite fit, but apparently everything being 16:9 aspect ratio centric maybe has limited the detailed settings that used to exist?