Support for LG Ultrafine 5K monitor

Hey! Unfortunately, I am quite out of my depth at this point. I wish I could help :smile:

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I did. No difference.

I almost never run on battery so I never noticed. Discovered yesterday, after running on battery for a bit - itā€™s like the laptop doesnā€™t know how to handle the power and video signal. If the laptop has a full charge, it stays charged.

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Sorry I donā€™t know how to quote/reply to a specific post.

@oxplot itā€™s really strange that the display doesnā€™t work when you have the battery disconnected; I get a very stable working connection every time it is disconnected. When itā€™s connected regardless of charge level the display has problems as observed by your oscilliscope traces. I donā€™t know what else I can do to help here. Maybe try Windows with the battery disconnected? Itā€™d be ideal to isolate this to only happening when the battery is connected.

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Select the part of someoneā€™s post you want to quote and a ā€œQuoteā€ button appears next to it. Clicking that will open the compose window and you can reply that way.

Ah totally missed that, thanks.

Can confirm the 11th gen framework doesnā€™t work with an LG-38WN95C (supports TB3) using its stock cable.

Ordered [Intel Certified] Cable Matters 40Gbps USB4 Thunderbolt 4 Cable 2.6ft with 8K Video and 100W Charging - 0.8m - Backwards Compatible with Thunderbolt 3 Cable and USB-C https://a.co/d/4GIQFZC
Will try it when it comes in (and hopefully remember to report back. @ me if I forget)

how did it go?

Works a treat. Full resolution and refresh rate, all peripherals functional and laptop is getting power

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Any suggestion for detect the monitor 27MD5KL-B with a ThinkPad X1 Carbon Gen 9 on Ubuntu 20.04.5 LTS (Focal Fossa), I detected two times but after suspend now it does not detected anymore.

I wonder if the display will work with the new AMD mainboard; Iā€™m not planning on upgrading to it though.

@software_developer for getting your laptop to work with the monitor, disabling battery - did you do this in the bios? or in the bios and actual physical disconnect of the battery?

Also when the battery is disconnected, are you powering it through the display or do you have a larger power brick also connected? i.e. 100W or more.?

I am currently getting disconnects every day that I have to usually wait a few mins and reboot to fix.

Actual physical disconnect of the battery. No changes to the bios. (Can you do the disconnect just via the bios?)

Nope, I think I power with the standard Macbook Air USB-C charger which I believe is 35W.

Is this with a BIOS battery disconnect, or with physical battery disconnect, or without any BIOS changes. Without disconnecting the battery my connection is completely unreliable. I can even use a 95W charger but itā€™s still the same issue.

I have not tried, but there is an option in the bios with the new firmware that was meant for allowing you to run the motherboard by itself without the battery, but it may require a physical disconnect as well, I havenā€™t tried it.

The disconnect I mentioned was the USB-C losing connection to my LG 27 5k monitor, and it just keeps trying, cycles through the lights blink red on the side of the laptop and go off and on again, the only way to fix is for me to physically disconnect the USB-C cable to my monitor, wait a few mintues, reboot and try again, sometimes a few tries before it stabalizes.

I use my laptop occasionally as a laptop i.e. no monitor connected so a physical battery disconnect would be a pain to do every time, but I might give it a go.

It has been a frustrating process, that makes me just want to call it quits get a 4k monitor instead that I connect via DP or HDMI.

I understand, thatā€™s why I havenā€™t been using my 5k monitor because I switch between using laptop as a laptop and using laptop with an external monitor at my desk.

But it would be cool to get another data point to see if the physical battery disconnect solves the unreliability/flakey problems when connecting to the LG UltraFine 5K. I think @oxplot said he tried disconnecting the battery and it didnā€™t do anything for him.

Iā€™ll also update the firmware and see if using the BIOS battery disconnect works.

Edit: looks like thereā€™s no BIOS update for 12th gen framework.

Forgot to mention, Iā€™m on the Gen 11.

I tried physical battery disconnect and using the ā€œBattery Disconnectā€ in the BIOS.

Now my LG Ultrafine 5K is working unreliably with either of these options. I think kernel updates may have made the situation worse :/.

I did however have an old debug kernel that I was using to try and investigate the issue further. When I switched to that, the display was a bit more reliable, both physical disconnect xor BIOS disconnect. However I think itā€™s a little worse with BIOS disconnect.

I really wanted this monitor to work, but I think Iā€™ve exhausted the solution space. I think the Intel developers donā€™t seem to know how to fix this and donā€™t have a 5k monitor to test with. I also donā€™t know if this is a Framework/BIOS/Firmware issue. I think in the coming weeks Iā€™ll probably give this display to my uncle so he can use with his Macbook M1 Pro which will undoubtedly support this monitor.

Hi all,
there were different versions of the monitor across time (see SO answer).
Could you people who got it working @Kent_Brockman and people who are giving up (@SoundBytes, @ software_developer, ā€¦?) or get a faulty experience (@ B_Hellman, ā€¦?) share with us the exact model you have as printed on the back?

Maybe by correlating success / failure with monitor TB controller (e.g. Alpine ridge vs Titan ridge?) apart from cable and Framework generation/bios we will start to see more clear?

Thanks!

PS. Thinking of buying one myself and utterly confused by the diversity of reports hereā€¦

I havenā€™t given up completely, it is frustrating process when it does go down as sometimes it is a full on crash, cannot recover, without hard boot.

@Alvaro_Tejero_Canter my model number from the back is 27MD5KL - purchased from Apple in 2020

@software_developer unplugged my battery and so far has been 8 hoursā€¦ and it is running flawless! no disconnect. NO need for reboot. So I have a glorified laptop that is a desktop.