Arch Linux

nicktee

Member

Registered: 2022-10-05

Posts: 11

Re: WD19TB: Screens randomly going to Standby / Slow flickering / Freezes

I just bought a WD19TBS to go with my Precision 5540 and I'm coming up against these issues. Did anyone ever find a way to work around them? Is the kernel param (enable_dp_mst) still the best/only mitigation? I also have a windows XPS here and I noticed that sometimes the Linux laptop leaves the dock in a state that the Windows laptop won't work either. I can't work out if the dock is broken (and I should return it) or if it's just left in a bad state by whatever Linux does to it.

One thing I _think_ I've noticed is if you plug in the dock and power plug together it's a bit more stable. Perhaps that reduces some of the power management going on. The message that precedes(?) a failure is always:

> pci 0000:01:00.0: Unable to change power state from D3cold to D0, device inaccessible

Which I understand is somehow related to PCI power management.

seth

Member

Registered: 2012-09-03

Posts: 51,325

Re: WD19TB: Screens randomly going to Standby / Slow flickering / Freezes

What is 01:00.0? GPU?
https://wiki.archlinux.org/title/Intel_ … Intel_CPUs
Alternatively try "pcie_aspm=0"

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bulletmark

Member

From: Brisbane, Australia

Registered: 2013-10-22

Posts: 653

Re: WD19TB: Screens randomly going to Standby / Slow flickering / Freezes

I was the one who originally reported MST as the culprit for WD19TB dock problems here and in various other places, but as I reported here (18 months ago) all problems with the WD19TB dock are fixed nowadays. The MST issue was in the Linux kernel (fixed since 5.10.16) but other problems were in the dock firmware so make sure you are running the latest firmware in your dock, and also best to update your laptop BIOS as well. I use fwupd to update both the dock and BIOS firmware.

nicktee

Member

Registered: 2022-10-05

Posts: 11

Re: WD19TB: Screens randomly going to Standby / Slow flickering / Freezes

What is 01:00.0? GPU?
https://wiki.archlinux.org/title/Intel_ … Intel_CPUs
Alternatively try "pcie_aspm=0"

Actually I think that was a red herring, it's the same error but slightly different

Oct 06 09:40:49 nickslaptop kernel: pcieport 0000:03:01.0: pciehp: Slot(1): Link Down
Oct 06 09:40:49 nickslaptop kernel: pcieport 0000:03:01.0: pciehp: Slot(1): Card not present
Oct 06 09:40:49 nickslaptop kernel: pcieport 0000:06:04.0: Unable to change power state from D3hot to D0, device inaccessible

Which I think corresponds to

06:04.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge DD 2018] (rev 06)
03:01.0 PCI bridge: Intel Corporation JHL6340 Thunderbolt 3 Bridge (C step) [Alpine Ridge 2C 2016] (rev 02)

also...
00:01.0 PCI bridge: Intel Corporation 6th-10th Gen Core Processor PCIe Controller (x16) (rev 0d)

But I have no idea if these are cause or effect.

@bulletmark, thanks for replying. I have updated the dock and laptop bios to the latest using fwupdmgr but the problems persist. I think it might be a configuration issue for me, good to hear it's possible to get the dock working now.

Last edited by nicktee (2022-10-05 23:02:49)