skypara
1 Nickel

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

The recent drivers update (including critical video driver) seem to get my 4K @60Hz though T3 to DVI Startech dongle work solid for straight 2 days. Did Dell finally nailed it?

awi231
1 Nickel

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

Looks like the last two driver updates, the firmware one for usb (TB15 has to be plugged in), and the intel video drivers solved it but I have only been testing for a few hours. I have wifi on and connected plus Ethernet in the dock. Haven't seen any hick ups and the dock doesn't seem that warm. Watched a bunch of 4k footage on youtube with my secondary monitor in the dock. Still going strong.

Besides the screen going to sleep, I had one other issue prior to this update. If I left my laptop the screen would timeout and go black, as it should. But I could never wake the secondary screen. I would have to unplug and power down the monitor. Replug in the dock and turn on the monitor. Minor issue, I hope that was solved too.

So far it's working. We will see how it is in a few days.

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awi231
1 Nickel

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

So after running it hard today, I found out this. 

It doesn't appear to have the screen flicker issue anymore. I turn it on, plug in to dock, and it works. For hours. 

If I leave it plugged in to the dock and put the laptop to sleep, it won't wake the secondary display. Only way to see the screen is to use the function keys and up down to an different option and hit enter, blindly. Or disconnect from the dock.

Basically anytime I have it plugged into the dock and put the laptop to sleep, the screen never wakes without switching to the laptop display. 

Keep in mind, I never shut off wifi. I had it always connected to a wifi network while connected to the dock. This caused no issues. I don't have the power decreased on the wifi either. 

Finally, I hope this is it. They may have actually fixed it. I will keep reporting as the days go by.

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awi231
1 Nickel

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

I want to add that I had another timeout style glitch. 

If I leave my laptop for 10 minutes my screen times out, and goes black. As it should. If I come back the secondary screen won't come on and I have to switch. Or the laptop screen will come on but it won't switch to secondary. The only way to get it to work again is, unplug the dock from the laptop and turn off the secondary monitor. Then turn back on and plug the dock back into the laptop. Select the secondary only and it works again.

Minor issue but it works otherwise. Finally!

I'll keep reporting. I do a lot of programming work so I'm always on my laptop.

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Highlighted
awi231
1 Nickel

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

Heads up everyone! I was bored for a minute after I just posted and checked out the drivers on support.dell.com. Dell posted a BIOs update that looks like it is the final patch for any left over issues. Today July 5th. Here is a copy of it. I'll update my laptop and report back.

Dell XPS 15 9550 A10 System BIOS

XPS 15 9550 01.02.10 BIOS

Fixes & Enhancements

1.Fixed Dell Thunderbolt Dock (TB15) device will lost after S3 resume
2.Fixed LCD flickering when in lowest brightness
3.Fixed After McAfee encrypted, the PCIE NVMe SSD \ SATA SSD can't boot to OS issue
4.Fixed Wake on WLAN takes a long time with Intel 1830/1820A Wireless card
5.Fixed USB audio/mouse may be lag while connected to Dell Thunderbolt Dock (TB15) and Dell Dock (WD15)
6.Support for Windows 10 Enterprise features
7.Fixed incorrect Thunderbolt security level reading from Driver
8.Fixed Touchpad may be lost after Dell Thunderbolt Dock (TB15) device connected
9. Add passthrough MAC address shows on BIOS Setup feature.
10.Fixed System will become shut-down with connected to Dell Thunderbolt Dock (TB15) after S4 Resume.
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pabster1192
1 Copper

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

I ran all the updates/driver/bios installs.   I am seeing issues when plugging in headphones to the WD15.  Audio works for a minute then drops.  I was running basic video testing from YouTube.  I unplug the headphones and onboard speakers work fine and video continues.  I attempted to play around with RealTek Audio drivers by using generic ones.  Now, the network drops completely and working even worse.  Tried reinstalling latest drivers again but now WD15 GIgabyte Lan drops off of device manager.

Anyone else seeing this?

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awi231
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RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

Pabster1192 - Are you running the XPS 13? The topic here is for the XPS 15 9550. As I understand the WB15 is only for the XPS 13. The solutions/driver updates I mention are for the XPS 15 with the TB15 dock.

Also everyone else, there are firmware updates for the thunderbolt controller that were released July 6th (today)

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awi231
1 Nickel

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

Everything is running well on my end. Just the wake issue from sleep to secondary monitor. Going on day 2 without any other issues.

I also want to mention, I tried to do the most recent driver - 

Intel(R) Thunderbolt(TM) 3 Firmware Update

This package provides the firmware update for Intel Thunderbolt 3 and is supported on Latitude 7275/7370/E5570, Precision 3510/5510/7510/771...
And it won't install. Says I need to update my Bios but I have the latest version already installed. I gave up on installing that update for now. Would like to figure out how to get that installed. I do have all the other drivers installed and up to date. Finally feel happy about buying that dock.

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gnarlybear
1 Copper

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

I have an XPS 13 with many of the same symptoms described in this thread - external screen via thunderbolt does not work do to flicker high fan (power) usage and, most significantly, the screens just cut out.

I wanted to report that dialing the wifi back as described by FLAMESFAN2635 addressed my issue as well. Does this mean the wifi range won't be as good in this situation?

For my XPS 13 you must use the thunderbolt port if you want an external display. I'm shocked Dell would allow this to persist or even expect a customer to except a $1800 computer that cant drive an external display! Worse, there customer service [sic] does not even seem to know of these solutions.

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CL0SeY
1 Nickel

RE: Trouble with XPS 15 9550, USB-C/Thunderbolt 3, and external monitors

Dell XPS 15 9550 A10 System BIOS

Still busted for me after this update. With USB-C to mini-DP adaptor going to a 4K monitor, it disconnected when I searched for Wi-Fi networks - when I have the Wi-Fi adaptor set to 100% power output.

Also for some reason now the 5GHz 802.11ac network I usually connect to is only connecting at 54mbps regardless of the power output setting I choose - not sure if related to the BIOS update.

I give dell an F.

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