Re: Dell WD19TB Thunderbolt Dock not working with kernel > 6.6.28-1

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On 10/22/2024 07:13, rick@xxxxxxxxxx wrote:
Hi all,

I am having the exact same issue.

linux-lts-6.6.28-1 works, anything above doesn't.

When kernel above linux-lts-6.6.28-1:
- Boltctl does not show anything
- thunderbolt.host_reset=0 had no impact
- triggers following errors:
   [   50.627948] ucsi_acpi USBC000:00: unknown error 0
   [   50.627957] ucsi_acpi USBC000:00: UCSI_GET_PDOS failed (-5)

Gists:
- https://gist.github.com/ricklahaye/83695df8c8273c30d2403da97a353e15 dmesg
with "Linux system 6.11.4-arch1-1 #1 SMP PREEMPT_DYNAMIC Thu, 17 Oct 2024
20:53:41 +0000 x86_64 GNU/Linux" where thunderbolt dock does not work
- https://gist.github.com/ricklahaye/79e4040abcd368524633e86addec1833 dmesg
with "Linux system 6.6.28-1-lts #1 SMP PREEMPT_DYNAMIC Wed, 17 Apr 2024
10:11:09 +0000 x86_64 GNU/Linux" where thunderbolt does work
- https://gist.github.com/ricklahaye/c9a7b4a7eeba5e7900194eecf9fce454
boltctl with "Linux system 6.6.28-1-lts #1 SMP PREEMPT_DYNAMIC Wed, 17 Apr
2024 10:11:09 +0000 x86_64 GNU/Linux" where thunderbolt does work


Kind regards,
Rick

Ps: sorry for resend; this time with plain text format



Can you please share a log with 'thunderbolt.host_reset=0 thunderbolt.dyndbg' on the kernel command line in a kernel that it doesn't work? This should make the behavior match 6.6.28 and we can compare.

Maybe the best thing would be:
* 6.6.28 w/ thunderbolt.dyndbg
* 6.6.29 w/ thunderbolt.dyndbg thunderbolt.host_reset=0





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