Well... My story was convoluted but can be easily summarized: Mint crapped out om HDMI. The OSS drivers work OK in Kubuntu And... I got a different TV set and worked right ot of the box. 55 inches. Loving it... :) ET Michael Butash writes: > So not sure how you ended up here, but I've been doing research, and > finally pulled the trigger on my desktop upgrade with 3x 4k monitors that > sadly all only come with hdmi ports vs. displayport natively. > > RE: cables, I ended up getting pretty generic, but well rated, amazon > "hdmi 2.0 compatible" cables, and so far no issues (I thought perhaps, but > more on that later). Now, to adapt to DisplayPort... > > Since almost no affordable video cards have hdmi 2.0, and especially not > in any quantity, some research yielded a bit ago club3d, maker of various > adapters, made hdmi 2.0 to displayport 1.2 adapters that could do full > 4:4:4 chroma. A buddy got one as a test with his Sekei 4k/30hz tv, but it > only did 4:4:2 anyways, but worked well to at least to that spec. > > My desktop prior was driving 6x 24" 1080 displays on an asus/amd 7970 > matrix card with 4x DP ports, plus 2x dvi. I ran my 6 just dandy at full > 11520x1200 res, now replacing with 3x 48" 4k samsung tv's to do in theory > full 4:4:4 at 60hz. > > Does it work? Yes, fantastically after some tweaking. I'm using 3x DP > ports off the same 7970 card to drive the club3d adapters, to HDMI to the > TV's. It was mostly plug and play, I instantly plugged in and saw a 4k > display window. Adding 2 more went just as well, never rebooting. > > So there are a few issues, such as I haven't figured out how to coax it to > do full 60hz, but I think I found out the issue, just haven't reset some > things. Not shabby for a 5-6yr old card, so don't believe the hype you > need an nvidia 970 card to drive 4k, you just need something with the > total framebuffer support. AMD is great about this. > > Another weird issue, that I totally thought was a physical issue for a > while, was apparently stupid amd drivers, again. I kept getting this odd > little wobbling effect in parts of the screens, and occasionally across > the entire tv until I moved the res around some in the amd control panel. > I kept swapping cables, adapters, and found no reasonable pattern, which > lead me to just again crap amd drivers. After some pain to upgrade, > downgrade, and eventually abandon the damn blob drivers and go with the > OSS Radeon drivers. Holy crap, they work, and better than the AMD ever > did, and all wobble/fragment/distortion is gone! > > The amd drivers worked, but very choppy when moving a big/busy window in > kde, with compositing off already by default on mine. Enabling compositing > drove it to a good 10sec lag in seeing a refresh. After moving to radeon, > I've enabled full compositing across the full 11520x2160 framebuffer, with > full wiggly effects and everything under kwin, and it's literally and > beautifully perfect. GL games seem to work fine too, at full res for mega > 3-head gaming. > > My only remaining issue is apparently there is a long-standing bug in 4.x > that the display configuration widget doesn't save and restore the display > settings for multi-monitors. It's a bit cranky when messing with it, > occasionally causing kwin to glitch, forcing me to drop to another tty and > restart the session. I wrote for now a script to setup xrandr after > startup to move the displays about that seems to work until I figure out a > better way. > > So 4k *does* work, or at least can, but seems mostly up to drivers, and > oddly, the tv settings as well. First thing I did was set mine to "gaming > mode", to lower the input latency, but apparently this has ramifications > that it doesn't allow full 4:4:4 chroma color if doing so. I think this > might be limiting my 60hz too, but not sure. TBD. > > Side note, I might go nvidia now that I'm down to 3x ports again, I just > need to go gtx960 or higher. Can't be worse than my 3x pci slot matrix > card, other than cost, and hoping nvidia drivers are less buggy. Then > again, with radeon drivers, I might not have to now. > > -mb > > > On 03/16/2016 10:54 AM, kitepilot@kitepilot.com wrote: >> In my infinite wisdom, I bought yesterday a laptop (Asus ROG GL752VW) and >> a 4K TV to use as a monitor. >> Stupid Windows 10 would not detect HDMI. >> OK, screw it, I'm going to dual-boot the thing anyway. >> Well, latest-and-greatest Linux Mint (KDE) doesn't detect the HDMI >> either... :( >> So... >> I bought a 'mini display port-to-VGA' adapter and plugged it VGA into the >> TV. It works, but I only get the same laptop resolution (1920x1080) >> ... >> 8-( >> So... >> Questions are: >> 1.- Can I expect my full 4K resolution if I get the #$@! HDMI working? >> and >> 2.- What can I do to get the #$@! HDMI working? >> Thanks! >> ET >> --------------------------------------------------- >> PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org >> To subscribe, unsubscribe, or to change your mail settings: >> http://lists.phxlinux.org/mailman/listinfo/plug-discuss > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > http://lists.phxlinux.org/mailman/listinfo/plug-discuss --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org To subscribe, unsubscribe, or to change your mail settings: http://lists.phxlinux.org/mailman/listinfo/plug-discuss