Stephen, out of curiosity, what does your xrandr show as a max framebuffer size on your quadro?

mb@host:~$ xrandr | grep maximum
Screen 0: minimum 320 x 200, current 11520 x 1200, maximum 16384 x 16384

This was a big limiter for me, in the past I couldn't figure out why my old ATI 5800 card with 6 ports wouldn't support a full, single framebuffer, but was internally limited to 8192x8192, with the 6xxx+ supporting 16384x16384.  Xorg wasn't too forthcoming with that info, and it was prior to xrandr support in their drivers, so totally left me scratching my head until escalating with AMD support to an engineer with a clue that told me that.

With the advent of 4k displays, they still seem limited to that, which means I can only do 4x wide until vendors give to open that up.

Thanks!

-mb


On 06/12/2015 03:55 PM, Michael Butash wrote:

Next time I have an absolute need to upgrade hardware, I plan on avoiding ati/amd at all costs.  After dealing with them for a good 5 years as the only real viable option to run my displays, only to be wrought with constant disappointment, problems, and frustration.  Buying highly overpriced quadro cards might be money well spent at this point, but I still despise nvidia that they're really little other than rebranded, and marked-up normal video cards with driver-locked (to bios-id) features.

That said, going to set up some ebay agents to look for decent quadro's to snipe.  I had good luck getting my last few amd cards that way on the cheap, gotta love jbidwatcher for cheating some other person with a last-second bid.

Thanks as always for the input Stephen.

-mb


On 06/12/2015 03:20 PM, Stephen Partington wrote:

I have almost given up on ATI, if i want just multiple screens i would look into the Quadro NVS cards. Such as the NVS 510 or the K1200. They may be very proprietary to get running, but my success with Nvidia cards in both linux and windows really makes it worthwhile. These cards will only do a single monitor, but they are cheap enough to run 2 cards with reasonable usability. or one NVS and one more Gamer friendly card.

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