I have the both the 5K and 4k 27UD88 connected. Netflix runs fine if I just have the 5K connected, but get the HDCP message if I have both connected. anyone with dual monitors have this issue?
Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
LG UltraFine 5K - Issues/bugs
- Thread starter iBrooker
- Start date
- Sort by reaction score
I"m having the exact same issue -- monitor basically works for 5 mnutes and either goes dark or recycles. Called LG and they are sending a new cable for free, but 10-day delivery window. Should i take it to Apple? how was your issue resolved? Thank you.
I believe this is already a known issue, but when use the volume up and down button on an external keyboard, the sound goes from low to super loud of just one click and then levels out even when you make it louder. Like going from 10% to 60% by increasing one bar only. I think this is a software issue rather than a hardware but very annoying nonetheless.
Yeah... they are big increments up/down. You can hold down shift+option to get smaller increments.
The hubs on the back keep failing. I have a Belkin USB C Network Adapter that intermittently disconnect when on video calls. Happens in both Skype and Google Hangouts. Also, when this happens it disconnects the Hard Drive plugged into the monitor and the built-in video camera and sound stop working. I have to unplug it from my Macbook Pro and unplug the power from the monitor to get it working again. The video on the screen is working the entire time. No issues there.
I have the same issue. I tried a second thunderbolt 3 cable and it did not fix the issue. The cable was not rated for 85W charging so that is one variance, but I don't think that would matter. I'm taking mine back to apple this week.
Let me know if you would. I'll probably do the same thing..
Last edited:
Has anyone had their mouse cursor get 'stuck' on the display? I've had this happen twice when I moved my mouse quickly and the 'large mouse' animation appeared on screen (but this doesn't happen every time). Essentially, image of the large mouse will stay on screen and above all window but my actual cursor would still work and appear on screen in the normal small size. Weirdly, I tried to take a screen grab but the image doesn't actually show the issue. I'll try taking a picture with my iPhone next time.
Similar issue here. Once I plug the thunderbolt 3 cable into my macbook pro, the display constantly flickers. I can't get it to work for over 30 seconds. I have the 15 inch macbook pro. I tried plugging the display into my brothers 13 inch macbook pro and it worked perfectly fine. I thought it was an issue with the cable until I tried that. Now I'm guessing it's an issue with my macbook...
I had that happen a couple times when I first got it. I mentioned earlier, I thought maybe I had a bad cable, because even a slight nudge at the monitor end would lose the connection. I unplugged and plugged in the cable three or four times and all my connection issues, included the mouse cursor issue you mentioned went away. Maybe there was dirt or grease or something in the socket... but it fixed my issues.
Interesting. On my end, I can confirm that the cable was firmly plugged in (in fact, I had read your posts previously before receiving my screen and the moment I was setting up last night, I reminded myself "make sure this is plugged all the way in!"
). Wiggling the cable doesn't cause the connection to drop. When the mouse thing happened, everything would still work perfectly fine (i.e. moving other windows, play videos etc.), I would just have the big black cursor stuck on my screen (sitting above all windows). I tried logging out but that didn't solve the issue so ended up doing a full reboot which solved it. When it happened the second time, I just unplugged the screen, cursor was not appearing on my MBP and replugging the screen in right after had everything working again.
Just received my display today, yeah
one bug I have, the usb hub can't keep up with usb 3 speed, I connected a usb-c 3 to giga ethernet adapter to hit and I don't get more then 440mbps, I get full speed directly connected to the Macbook Pro... I'm I alone?
one bug I have, the usb hub can't keep up with usb 3 speed, I connected a usb-c 3 to giga ethernet adapter to hit and I don't get more then 440mbps, I get full speed directly connected to the Macbook Pro... I'm I alone?
The hub is slow. USB 3.1 Gen 1 drives are slower (about 10%) than on the MacBook Pro as well. I would use it only for slower USB devices like keyboards and mice. I suppose USB speakers would be fine too.
Are you using a 13" or 15" MBP? If you are using a 13", have you tried connecting to the left TB ports (right hand TB ports have lower bandwidth). Specs for the 5K has the USB-C port running at 5Gbps should this should be working.
EDIT: To add to @sidewinder 's comment above... Even losing 10% (which IMHO is reasonable for any hubs vs. direct connection), this shouldn't translate to 440mbps on a gigabit ethernet port.
I wouldn't expect a proper hub to lose 10% until the bandwidth was near to being fully utilized.
Also, people with faster drives saw more siginificant speed loss than I did on the LG 5K display hub. So I stick to my recommendation. At least until I see how the OWC Thunderbolt 3 dock performs with it's USB 3.1 Gen 1 ports.
Ah. I was always under the assumption that you would lose speed with any hub just due to the overhead (and just like how you can never hit full bandwidth of any protocol in real-world application). I'll do some testing with external drives as well tonight and report back in the Hub speed tests thread.
Loosing 10% from a super speed external SSD is something, but getting USB 2 speed is another story... In theory, some people measured 240mb/s speed with the screen (about 2Gbps) so I shouldn't have any problem reaching 920mbps
It works perfectly fine for a backup hard drive. Even on an SSD I got 240W/320R, so about a 30-40% reduction compared to a direct connection. But fine for backups.