On 04/06/2018 02:33 PM, Sean Cody wrote:
On 2018-04-06 14:09, Gilles Detillieux wrote:
Well, there is a surprising amount of cards that don't support 4k, especially the lower cost ones.
Interesting.
My Lenovo X220 and X230 with 'on board graphics' supports 4K quite well (both specific 4K monitor and 4K TV). You don't get 60hz unless using DisplayPort and you will need an active adapter if you have to convert HDMI or some other nonsense. The older the device the higher the chance you will suffer 4K@30hz but that didn't kill me. :)
My PoC T430 does 4K via DP and miniDP and through full DP on the dumb dock (typing this now on said device attached to Samsung UE590 panel)
Any ATI/Nvidia card with DP1.2 or better should be sufficient in my limited experience.
As far as I can tell, the onboard ATI Radeon 3000 on this motherboard won't do 4k. We don't have the monitor yet so I haven't been able to try, but I'm pretty sure the maximum pixel clock rate is too low even for 30 Hz (which we probably could live with).
I know there are lots of cards out there that can do 4k@60 Hz, and it's reasonably easy to weed out the ones that don't (as long as the online specs are reasonably detailed - so Best Buy isn't the best place to look). The issue is weeding out the ones that won't have reliable driver support under CentOS 7. If I stick to the chipset lists from X.org, I come up empty as far as 4k-capable cards on the market right now. Problem is those chipset lists aren't necessarily complete: we have a PC with onboard nVidia Quadro K2200 which does work with nouveau, even though that's not listed as a supported chipset. But I can't find a new Quadro K2200 card. I can find a K420 card, but it's anybody's guess if it'll work with nouveau. All I could find via Google was people struggling to get a K420 to work with nVidia's own Linux drivers (which somewhat suggests using nouveau wasn't an option).