[Expired for linux-raspi (Ubuntu) because there has been no activity for
60 days.]
** Changed in: linux-raspi (Ubuntu)
Status: Incomplete => Expired
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
I got all 16 USB ports on the hub recognized by plugging it into the
usbC port. A few things needed to happen in advance for that to work. 1.
Supply power through PoE (or GPIO on the Pi4). 2. Switch the USB C port
to host mode, and using the dwc2 driver. 3. Reboot Pi4. It's down to
USB2.0 speed
The ehci driver does not support this controller. It's an XHCI
controller so only the xhci driver works. You would have to modify the
ehci driver to recognize it and you probably also need to disable the
xhci driver completely but I'm not sure if this will work.
--
You received this bug
I understand there is no way around the 32 device limit on the VL805
using USB3. But I'm nowhere near 32 devices, yet. On the Pi4 I don't
even have a keyboard plugged in. It has one 16port USB3 hub, and I'm
only able to plug in 6 hard drives on it when the hub is on a USB3 port,
or 12 hard
Ok so the xhci spec allows for more endpoints but Intel's implementation
seems to be limited to 96 endpoints. But the datasheet of the VL805
specifies 20h (32) for MAXSLOTS so 32 devices seems to be a HW
limitation on the Pi's USB controller as well. There's no way around it.
--
You received
As a minimal I'd like to utilize all the 16 ports on this usb hub. usb3
would be preferred but usb2 is acceptable. so this limit is not on the
OS and on Windows I'd have the same issue with 1 single USB controller?
--
You received this bug notification because you are a member of Ubuntu
Bugs,
The 32 devices is an xhci limitation. No way around it (/me thinks).
xhci only supports up to 96 endpoints and each USB device consumes at
least 3 endpoints...
And then you have a tiered structure with hubs so the number of
attachable 'real' devices is reduced even further.
Seriously? You want
So it looks like other than the internal devices that count towards this
xHCI max limit of 32 (what are they? Audio? Bluetooth? Can they be
disabled to free up space), the 16 port USB3 hub itself is probably
daisy chained internally and takes up spots as well. I've read that by
switching to the
~$ uname -a
Linux Ubuntu1 5.4.0-1034-raspi #37-Ubuntu SMP PREEMPT Mon Apr 12 23:14:49 UTC
2021 aarch64 aarch64 aarch64 GNU/Linux
Imaged this through the Raspian Imager after selecting the 20.4.02.
Server LTS for ARM64
~$ lsusb -t
/: Bus 02.Port 1: Dev 1, Class=root_hub, Driver=xhci_hcd/4p,
Marked as incomplete for Juerg's information request.
** Changed in: linux-raspi (Ubuntu)
Status: New => Incomplete
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1928710
Title:
ubuntu
You won't be able to connect 32 devices since there are are already
internal devices and hubs.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1928710
Title:
ubuntu server 20.04 LTS for ARM64 on
What kernel version? What does the output of 'lsusb' show when you get
the message?
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1928710
Title:
ubuntu server 20.04 LTS for ARM64 on Raspberry Pi4
There is some comments online about having the system switch from xHCI
to eHCI but none of the suggested methods worked.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1928710
Title:
ubuntu server
13 matches
Mail list logo
