MST1407,
In my normal work environment, the laptop is face down on the docking station, and I only use the monitor or monitors that are hooked up to the docking station.
For purposes of testing, I was only hooking up a single monitor to the docking station – the LG 32UD59-B . And with a blank screen, I had no way of editing any of the display settings as you suggested.
If I put the laptop with the display up, I could access the driver settings. And then, by hooking up the monitor on DP #2 of the docking station, I could get it to work at 4K60 using the CAC-1080. However, as soon as I disabled the multi-monitor mode, ie. disabled the built-in display, the Intel graphics went back to its broken settings, and could no longer send a signal to the LG at all.
I then put the laptop face down again, and hooked up another monitor – my Asus PB238Q in portrait mode, which is physically located to the right of the LG . This allowed me to use the Intel graphics. I was then able to get it the LG to “work” in 4K50 . 4K60 still resulted in no signal. However, there is sometimes “white snow” blinking in the top left of the screen when moving windows. So it is still not really working as intended . 4K50 would be good enough for me if it wasn’t for this snow problem.
If I disable the Asus display to run the LG by itself, once again the Intel graphics switches to its default 60 Hz and results in no signal with the CAC-1080 .
It seems I just can’t manage the display settings when running the LG by itself. The driver is “too smart” and records the settings for each combination of monitors.
I think the only thing that’s really going to work for me is a properly fixed adapter. Is there any chance Club-3D can work with me to fix the firmware to make it work ?
As to docking stations causing problems, I was previously running two HP LP3065 30″ monitors at 2560×1600. I used Accell adapters to convert the DisplayPort to 2560×1600 at 60 Hz. This worked perfectly fine in Windows, though it didn’t work during BIOS time (black screen).
I would really appreciate your help fixing the adapter, as I planned to purchase several of them in order to utilize all the inputs on my two LG 32UD59-B monitors to run all 3 computers I have.
At the moment, the best I have achieved is this :
1) desktop #1 with GTX 960
DP#1 to LG 32UD59-B monitor DP input on the left . 4K60 / 10 bit
DP#2 to LG 32UD59-B monitor DP input in the center. 4K60 / 10 bit
HDMI to Asus PB238 monitor in portrait mode on the right . 1080p
2) desktop #2 with Intel Graphics 520
DP + CAC-1080 to LG 32UD59-B monitor in the center . 4K60 / 8 bit
HDMI to Asus PB238 monitor in portrait mode on the right . 1080p
3) laptop
HDMI to LG monitor on the left HDMI in . 2560×1440 at 60 Hz . Or 4K30
DP #1 to LG monitor in the center HDMI in . 2560×1440 at 60 Hz . Or 4K30
Technically, the Asus PB238 is hooked up to a DVI KVM, not directly to each computer.
Really wish there was a DisplayPort KVM that did 4K60 and didn’t cost more than the price of my two LG 4K monitors combined. If there was, I wouldn’t need to mess with any active converters …
I plan to buy another GPU with for desktop #2 to also run the LG monitor on the left in 4K60 with that computer – ie. drive all 3 monitors with the desktop. It could be either a GPU with native HDMI 2.0, or a GPU with DisplayPort paired with another CAC-1080 .
For the laptop, I would like to run the LG monitor in the center at 4K60 + Asus PB238Q in 1080p, both hooked up to the docking stations. This would entail having a working CAC-1080 adapter that can convert the DP 4k60 to HDMI 2.0 4K60 – the problem right now, and subject of this thread. Right now, the CAC-1080 adapter achieved only 4K50 with some intermittent white snow.
I know the Intel Graphics 520 GPU on the laptop with docking station cannot run both LG monitors in 4K60, as I tried that combination with straight DisplayPort to DisplayPort, and it could only manage a single monitor at 4K60 – no signal on the other DP. Otherwise I would run both if I could.
As you can see, I could possibly have as many as 3 CAC-1080 in use if they all worked – two for desktop #2 and one for the laptop . Hardly a volume customer, but still, I would own three of the CAC-1080 .
This issue really has been driving me nuts all weekend trying to get things to work at 4K60 on the laptop . If I can’t make it work reliably, I may return the LG monitors to Fry’s and sticking with my two HP LP3065 for years … Would be a shame though as I had been waiting to switch to 4K for so long, but never found affordable 4K monitors with enough inputs and a sufficiently ergonomic mechanism to switch inputs. Most monitors require going deep into menus to switch. The LG has a joystick underneath that is more usable (but still not as good as a KVM with keyboard hotkeys) . It doesn’t autoswitch input also if one input loses signal, like my HP did. On the other hand, the LP 3065 had a great input pushbutton toggle that was better than the LG joystick.
