Crap! HDMI... :( Help!

Thu Apr 14 23:01:30 MST 2016

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 at 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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