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
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