Dell UP3218K | An “8K” monitor at 32″ via 2x DisplayPort

Promotional Page

Does it work with Linux (Wayland Weston etc.): UNKNOWN.
There is no clear positive statement that it does… or does not.

The headline specs are all those fun “little lies” that commerce gets to flourish itself with …wherein “8K” equals 7600, and “32 inches” equals 28.4″ etc.


  • “8K” = 7680 x 4320
  • 32″ = 31.5″ =28.4″ × 8.5″ × 24.3″
  • 17 Kg = 37.47 Lbs.
  • 60 Hz
  • 2x DisplayPort 1.4+
    Something about HDMI 2.0 maybe.


From the Drivers & Manuals subpage

  • May or may not be Windows Only
    Some commentariat that MacOS is “not supported.”
    Claimed <quote>All NVIDIA 10xx cards, and their TITAN line, support 7680×4320@60Hz natively.</quote>
  • Requires both cables to provide the “8K” mode.
  • Which graphics cards are supported?
  • AMD video cards may or may not be supported.
  • Intel HD Graphics may or may not be supported.

Via: backfill.

VIZIO P702ui-B3 70-Inch 4K Ultra HD Smart LED HDTV

Via: backfill


Metric Value Context
(Effective) Refresh 240Hz
Resolution 3840×2160 Ultra HD
HDMI 5 ports 3x HDCP v2.2
Mount 400mm x 400mm M6 screw, 10mm
Weight 63 lbs







Planar UltraRes UR8450-3D-ERO-B-T 84″ Touch, Multi-User Multi-Touch 4K Display

Planar UltraRes UR8450-MX-ERO-B-T 84-Inch Screen LED-Lit Monitor; 240 pounds; Amazon: $29,000+TAX+PRIME.


  • Planar® UltraRes™ Series is a family of 84″ Ultra HD (3840 x 2160)
  • Inputs
    • 1x DisplayPort 1.1a
    • 4 x HDMI with Deep Color and 4K support
  • Control
    • 1 x RS-232
    • 1 x LAN 10/100BaseT
    • 1 x USB 2.0
    • 1 x IR




Samsung U28D590D, a 4K Monitor with DisplayPort

Specifications U28D590D

  • 28″ Screen
  • 3840 x 2160 pixels
  • Inputs
    • 1x DisplayPort (which version?)
    • 2x HDMI
  • $845+SHT.
  • Limited availability in 2014-Q2.



AOC Q2963PM 29″ Monitor with DisplayPort v1.2 in/out

AOC 29-inch IPS Q2963PM (21:9) LED Monitor; $379.00+T.

Features (Specifications)

  • Interconnect multiple displays to create a daisy-chain
  • 2560×1080 @ 60 Hz
  • Mobile High-Definition Link (MHL) to connect and charge the phone


  • It’s not entirely stated that it supports Display v1.2, it just says “DisplayPort” but it does have a DisplayPort output and the marketing collateral does exhibit a use in a daisy-chained scenario.
  • Whether special drivers are required or it is “Windows only” is unclear.
  • AOC is typically “Windows only”; c.f. AOC E2251FWU 22″ DisplayLink USB Monitor


Seiki & TCL, 4K Monitors & TVs, early 2014

tl;dr => these are all “televisions” that accept only HDMI inputs. There is no DisplayPort.

Sources: Amazon, unless otherwise noted

Seiki Digital SE50UY04 50-Inch 4K UHD 120Hz LED HDTV; $1,000.

  • Submodels (what does this mean?)
    • 39″ submodel
    • 50″ submodel
    • 65″ submodel
  • Inputs:
    • 3x HDMI

TCL LE50UHDE5692G 50-Inch 4K Ultra HD120Hz Smart LED TV; $1,100; out of stock.

  • Inputs:
    • 3x HDMI

TCL LE50UHDE5691 50-Inch 4K Ultra HD 120Hz LED TV; $906.

  • Inputs:
    • 4x HDMI

Samsung LN40C650 “failing” with black vertical stripes (SOLVED)

Correct Diagnosis

  • Faulty seating on HDMI1 affects video arriving from HDMI4.

See Configuration and Specification below.


  • Reseat HDMI1 (independent input from TiVo).
  • See the signal from HDMI4 (the Xbox) clear up.


  • HDMI1, HDMI2, HDMI3 are all “horizontal”.
  • Connections into these sockets have a tendancy to “droop” and place pressure on the female side of the connector.
  • Unless the inbound connector and wire is supported, the force of gravity, over time, will cause these connections to become loose and failure prone.
  • HDMI4 is “vertical” and will have less of this effect.


These are barely acceptable when they are black.  When they become white, the display is unwatchable.


  • The behavior commenced after The Focus Group rerouted some video inputs and then replace them “as they were before.” See History below.
  • The behavior occurs independent of any video input signal; with no input video signal.
  • It occurs even in “Self Diagnosis” mode where the TV exhibits its own internally-supplied image.
  • There has been no internal intervention (never opened up the back).
  • The device has been mounted on a wall and cannot be jostled or insulted. But see History below.

Did you reboot?

Well, first of all, the display devices don’t run Windows, they run Linux. Rebooting isn’t generally remediatory for anything. But of course, I did a hard powercycle and replugged the power cables.


  • The behavior occurs without a video signal => it’s not an HDMI decode issue.
  • Tough to believe that internal cables became spontaneously unseated.


  • Recently, The Focus Group decided to experiment with daisy chaining the video signal as Comast->TiVo->XBox->Samsung to give XBox One the pride of place
  • That’s the product vision/promise/aspiration for the XBox One: “The One Box for the living room” (think: as with the Windows monopoly; one ring to rule them all).
  • Of course this failed.
    • XBox One can’t control the DVR features of the TiVo.
    • XBox One can barely redisplay the live TV;
      It can redisplay a signal only if it’s previously decoded with the CableCARD that’s in the TiVo.
    • XBox One can’t play recorded programs or direct the TiVo to run its applications.
  • Thus, the XBox One, again, stands alone feeding HDMI to the Master Display. It is the Master Display that rules them all; as that is what provides ultimate the value.


What are the chances that during this plugging, unplugging, replugging of HDMI cables, that some aspect of the HDMI male/female seating in HDMI1 through HDMI3 became loose enough?


  • Run (ahem) daily 8+ hours with sporadic intermissions.
  • Purchased 2013-08-01 (TV is 3.5 years old)



Samsung Series 6, Model L40C650; User Manual; 60 pages (10MB, huge)

But what did “the net” say?  Anything helpful? [tl;dr => Not really]

Consensus Diagnosis

  • The LCD is failing => it is not fixable, throw out the unit.
  • The LCD builds of that era were low quality and/or had low lifespan anyway.
  • Samsung makes “cheap TVs” and this is the best that can be hoped for, or something like that.


  • Rly? => TVs should last “a decade” or so; that’s a problem that the TV vendors are actively trying to deal with … that people buy cars more often than they buy a new TV.
  • ahem => Isn’t it the case that the “cheapie TV makers” just buy their parts from Samsung’s remainders, not the other way around?

Alternate Diagnosis

From random prattle on the forums; it’s fixable, but …

  • It’s some fuse, caused by a “voltage surge.”
  • It’s some (internal) “tab” connecting to the LCD.
  • It’s some (internal) ribbon cable that as come loose.
  • It’s a “T-Con” board (every poster spells & abbreviates this part name differently).
  • It’s a firmware issue.
  • It’s an HDMI decode issue => replug the cables, powercycle (these were perilously close to correct)


AMD’s Catalyst 13.8 Beta1 is busted

Revert to catalyst-13.4 and stick with Kernel 3.9


This is an operable configuration; with 4x Hewlett-Packard ZR30w

$ rpm -q -a | grep -Ee '(catalyst|kernel-[^d])' | sort


As of 2013-08-24, the use of 4K displays, e.g. the ASUS PQ321, no longer functions.  The FirePro video system forces the 4K display back to a lowrez mode.  That is fully characterized here.   A configuration with 2x HP ZR30w and 1x ASUS PQ321 worked well for weeks.  Then one day, without any updating, it stopped functioning and won’t work (even a full powercycle of all components).  The  ASUS PQ321 had to be removed from the system; 4x HP ZR30w works fine (but only with catalyst-13.4)



  • [381120] Kernel 3.10 support
  • [379176] “Testing use only” watermark removed
    … pesky but benign relative to the lethargy and breakage of catalyst-13.8


catalyst-13.8 is broken and unusable.

  • Only “updates” the static GNOME desktop when there is motion; e.g. mouse motion.
  • In gnome-terminal, it has the feel of working on a 1970s very slow 100-baud tty.
  • There seems to be a ~20 sec to ~30 sec timeout after which pending graphics events are flushed.
  • Putting the desktop into full compositing mode (e.g. ALT-F2) allows the X events to stream freely (e.g. video playback functions).
  • glxgears doesn’t run the gears unless ALT-F2 or the mouse is used to move the window around.
  • This is unusable.


The symptoms are all different (and different from mine):

Preventing the GNOME (Xorg) screen from blanking to operate the Hewlett-Packard ZR30w via AMD FirePro W9000 Eyefinity

Because the Hewlett-Packard ZR30w displays do not always recover from sleep mode, it is best to keep them “always on.” When they fail to recover from sleep mode, they have “snow” and are unusable. Xorg must be killed and you have to rebuild the desktop.

sudo systemctl restart gdm


  1. gsettings set org.gnome.desktop.screensaver idle-activation-enabled false
  2. xset -dpms

Also suggested, for /etc/X11/xorg.conf

Section "ServerFlags"
    Option "BlankTime" "0"
    Option "StandbyTime" "0"
    Option "SuspendTime" "0"

xset -dpms s off s noblank s 0 0 s noexpose
xset -q

Via: backfill

ASUS PQ321Q Tiled Monitor | PC Perspective

ASUS PQ321Q 31.5-in 4K 60 Hz Tiled Monitor Review; ; In PC Perspective; 2013-07-19.


  • DisplayPort SST (Single-Stream Transport)
  • DisplayPort MST (Multi-Stream Transport)
  • <quote>By enabling SST mode though you can connect a single HDMI cable or use DisplayPort to run more standard resolutions like 1920×1080 or even 3840×2160 at 30 Hz.</quote>
  • Implemented internally as 2x 2160×1920
  • SST supports 3240×2160 only at 30Hz.
  • <quote>The ASUS PQ321Q (and the Sharp PN-K321) are both powered by STMicroelectronics Athena controller</quote>


But not verified in the article

  • The monitor can handle 4096×2160 inputs by clipping the video stream


Unclear from the article

  • The device may require DisplayPort 1.2 MST to get to the full 4096×2160.  But one sentence claims that SST mode can handle 3840×2160 (at 30 Hz),
  • May not get to full resolution on DisplayPort 1.1


Credits in the links

View Full Size

View Full Size

View Full Size

View Full Size

View Full Size

View Full Size

ASUS Model PQ321


  • ASUS Model PQ321Q
  • DisplayPort 1.2
  • 3840×2160 (4k2k UHD)
  • Weight
    • 37.48 lbs (shipping? source: Amazon, ASUS)
    • 28.6 lbs (desk? source: ZDNet specifications, below)
  • Mounting: VESA 200x200mm



See the ASUS Specifications.
Source: ZDNet


Also: backfill, previously noted


Source: ASUS, and others
Product Image

Seiki SE50UY04 TV

Seiki SE50UY04 TV


  • 4k2k support
  • $1,500
  • Available now (Amazon, TigerDirect)
  • 50″, LED, bright, 120Hz


Why so cheap, the other ones are four our eight times that price, and/or not available.
tl;dr => it’s a TV, not a monitor.

  • 4k2k
    • 3840×2160
    • 30Hz refresh (not 120Hz)
  • no DisplayPort.
    • only HDMI (3x HDMI)
    • the usual legacy video connectors.


  • Just does the video thing and a single TV tuner.
  • No onboard computer; i.e. no “apps”

Reviews & Rumors


Attribution if the images in the links.

How We Do It

Seiki SE50UY04 : AngleSeiki SE50UY04 : ControlsSeiki SE50UY04 : Rear PortsSeiki SE50UY04 : Side PortsSeiki SE50UY04 : Remote

ViewSonic VX2739WM

Fine piece of equipment.  Vesa wall-mount capable

ViewSonic VX2739WM

see successors Suggested: VX2753MH-LED; $376; Amazon available $330 (may not be vesa wall mountable).


  • [some dude sez] <quote>I have one and it’s great for gaming.</quote>
    tl;dr => love it.
  • Jeremy Laird; Viewsonic VX2739WM review; In TechRadar; 2010-06-01.
    Teaser: The world’s first 1ms monitor? Meh…
    tl;dr → he hates it, no wait, he likes it. <quote>All of which means we’re very happy to recommend Viewsonic’s latest. For under £300, it’s a very nice image-rendering device. Just don’t get too excited by all that 1ms malarkey. It’s basically a load of rubbish.</quote>


ViewSonic VX2739WM 27-Inch 1920x1080 Full HD MonitorViewSonic VX2739WM 27-Inch 1920x1080 Full HD MonitorViewSonic VX2739WM 27-Inch 1920x1080 Full HD MonitorViewSonic VX2739WM 27-Inch 1920x1080 Full HD MonitorViewSonic VX2739WM 27-Inch 1920x1080 Full HD Monitor