linux-kernel - Re: [REGRESSION][BISECTED] "xHCI host controller not responding, assume dead" on stable kernel

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Date: Wed, 22 May 2024 16:41:19 +0200
From: Gia <giacomo.gio@...il.com>
To: Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc: Benjamin Böhmke <benjamin@...hmke.net>, 
	Mario Limonciello <mario.limonciello@....com>, Christian Heusel <christian@...sel.eu>, 
	Linux regressions mailing list <regressions@...ts.linux.dev>, 
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, 
	"stable@...r.kernel.org" <stable@...r.kernel.org>, "kernel@...ha.zone" <kernel@...ha.zone>, 
	Andreas Noever <andreas.noever@...il.com>, Michael Jamet <michael.jamet@...el.com>, 
	Yehezkel Bernat <YehezkelShB@...il.com>, 
	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>, "S, Sanath" <Sanath.S@....com>
Subject: Re: [REGRESSION][BISECTED] "xHCI host controller not responding,
 assume dead" on stable kernel > 6.8.7

Now this is odd...

I've tested another cable - a very short one used with a Gen3 nvme
enclosure that I'm sure it's working - and I got Gen2 20 Gbps. I also
have tested this on Windows 11 and I still just got a Gen2 connection.

I was almost sure it was caused by a bad USB4 implementation by the PC
manufacturer, then I tried to connect a Thunderbolt 3 disk enclosure
via daisy chain to the Caldigit dock and I got the full Gen3 40 Gbps
connection! See the attached picture.

I'll try to connect the dock to a laptop via Thunderbolt 3 as a last
test and I'll report back.



On Tue, May 21, 2024 at 1:26 PM Mika Westerberg
<mika.westerberg@...ux.intel.com> wrote:
>
> On Tue, May 21, 2024 at 11:12:10AM +0200, Gia wrote:
> > Here you have the output from the dock upstream port:
> >
> > sudo tbdump -r 2 -a 1 -vv -N2 LANE_ADP_CS_0
> >
> > 0x0036 0x003c013e 0b00000000 00111100 00000001 00111110 .... LANE_ADP_CS_0
> >   [00:07]       0x3e Next Capability Pointer
> >   [08:15]        0x1 Capability ID
> >   [16:19]        0xc Supported Link Speeds
> >   [20:21]        0x3 Supported Link Widths (SLW)
> >   [22:23]        0x0 Gen 4 Asymmetric Support (G4AS)
> >   [26:26]        0x0 CL0s Support
> >   [27:27]        0x0 CL1 Support
> >   [28:28]        0x0 CL2 Support
> > 0x0037 0x0828003c 0b00001000 00101000 00000000 00111100 .... LANE_ADP_CS_1
> >   [00:03]        0xc Target Link Speed → Router shall attempt Gen 3 speed
> >   [04:05]        0x3 Target Link Width → Establish a Symmetric Link
> >   [06:07]        0x0 Target Asymmetric Link → Establish Symmetric Link
> >   [10:10]        0x0 CL0s Enable
> >   [11:11]        0x0 CL1 Enable
> >   [12:12]        0x0 CL2 Enable
> >   [14:14]        0x0 Lane Disable (LD)
> >   [15:15]        0x0 Lane Bonding (LB)
> >   [16:19]        0x8 Current Link Speed → Gen 2
> >   [20:25]        0x2 Negotiated Link Width → Symmetric Link (x2)
> >   [26:29]        0x2 Adapter State → CL0
> >   [30:30]        0x0 PM Secondary (PMS)
>
> Hmm, okay both sides announce support of Gen3 yet the link is Gen2 which
> makes me still suspect the cable, or the connection in general. I
> suggest, if you have, try with another Thunderbolt cable.

Download attachment "CaldigitTS3Plus_Win11_link_speed.jpg" of type "image/jpeg" (385686 bytes)