XPS 9550: Latest Thunderbolt firmware upgrade destroys HDMI port

Same. Installed the new firmware successfully, restarted and now my HDMI port is more or less dead. The Laptop still detects the external monitor but it won't output anything.

Tried reinstalling the Intel HD Graphics driver, changing resolution, different cable, different monitor... nothing helps.

Sorry to hear that guys, I'll look into it for you.

Can you please confirm the version of Thunderbolt driver that you have installed?

Earlier versions of the firmware can be found here:

downloads.dell.com/.../xps-15-9550-laptop.html

Thanks

Meanwhile I tried installing the old firmware. Setup tells me thunderbolt is up to date. Still no HDMI output. I think this update just killed the HDMI port :emotion-12:

I am seeing the same here on a Precision 5510 which I think is the same platform as the XPS 15: External DVI screen connected  to HDMI via an adapter shows inverted colours after the update (actually it started during the final steps of the update). Disabling Thunderbolt in UEFI does not help.

The new Thunderbolt firmware version is  4.26.03.001 ,A07, released today.

Unfortunately, there is no older version of the firmware available for download for my service tag.

Same driver versions like Carsten here on my machine (latest official).

However I run in security level SL0.

Unfortunately an earlier version doesn't work. You can't downgrade the firmware. Once you installed it you are stuck with it. Unless DELL is updating it's thunderbolt firmware again the HDMI port will be unusable.

Same here, latest Thunderbolt firmware/drivers  inverts the colors on the HDMI port on my XPS 9550.

Intel-Thunderbolt-Controller-Driver_7X8Y6_WIN_16.3.61.275_A03_01

Intel_TBT3_FW_UPDATE_NVM26_0RX1K_A07_4.26.03.001

Please fix ASAP, it's now unusable with multi monitor setup.

/M

PS, I suggest everybody with this problem to tweet to @DellCares and make them fix it asap.

Same problem. Hdmi port just flickers the screen on and off. DisplayPort screen through thunderbolt port still working.

XPS 15 9550

Installed the Intel_TBT3_FW_UPDATE_NVM26_0RX1K_A07_4.26.03.001 update

It is not possible to downgrade the firmware with any old installer as it says it is fully up to date.

So the firmware now crashes the HDMI of one laptop after another... and Dell has not even bothered to remove it from the download page yet ;-)

I'm having the same issue on my XPS 15 9560 as well. I'm getting inverted color output through the hdmi port. I hope there's a quick fix. I cannot work on this kinda environment........

Just contacted Dell support about this problem, and here is their answer:

"Thank you for reaching out to us. We do not have any known issues with this system. As you have issues with the display, we recommend you to install the latest drivers from our support webpage."

So, basically Dell gives me the middle finger.

Hi guys,

I've escalated this issue to our engineering group. I'll update you all as soon as I get anything back from them.

Hey Guys,

Could you send me a PM with your service tag and email please?

PM sent with info.  Same issue here - high contrast scheme stuck on HDMI out port on laptop.