I have checked v5.2 and it is working.
How to install it on upgraded 18.04 frm 16.04 which is not bootable due 
to this usb bug?
Is it possible to install it from bootable 16.04 (I have it on on 
different partition)?

Kai-Heng Feng:
> Spotted this commit when I am doing an unrelated task:
> commit f7fac17ca925faa03fc5eb854c081a24075f8bad
> Author: Andrey Smirnov <andrew.smir...@gmail.com>
> Date:   Wed May 22 14:34:01 2019 +0300
>
>      xhci: Convert xhci_handshake() to use readl_poll_timeout_atomic()
>      
>      Xhci_handshake() implements the algorithm already captured by
>      readl_poll_timeout_atomic(). Convert the former to use the latter to
>      avoid repetition.
>      
>      Turned out this patch also fixes a bug on the AMD Stoneyridge platform
>      where usleep(1) sometimes takes over 10ms.
>      This means a 5 second timeout can easily take over 15 seconds which will
>      trigger the watchdog and reboot the system.
>      
>      [Add info about patch fixing a bug to commit message -Mathias]
>      Signed-off-by: Andrey Smirnov <andrew.smir...@gmail.com>
>      Tested-by: Raul E Rangel <rran...@chromium.org>
>      Reviewed-by: Raul E Rangel <rran...@chromium.org>
>      Cc: <sta...@vger.kernel.org>
>      Signed-off-by: Mathias Nyman <mathias.ny...@linux.intel.com>
>      Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
>
> Can you try this? It's in Linux kernel v5.2.
>

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1822363

Title:
  Booting hangs when USB 3.0 Etron EJ168 PCI card is detected

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I have installed Etron EJ168 PCI USB 3.0 [1B6F:7023] which briliantly works 
in any Windows OS (I use multiboot PC) on my Conroe865PE AGP/PCI Intel 
Kentsfield QX6800 system with classic BIOS (non UEFI).
  There are no devices connected to PCI USB card during boot.

  The desktop Ubuntu 18.04 kernel 4.15.0-46-generic freezes with this
  card during boot (see attached "photo log" with boot and grub
  options). I can't access/login Ubuntu or console. It was checked and
  confirmed on ubuntu-18.04.1-desktop-amd64.iso LIVE CD desktop (with
  acpi=off option too).

  Previously I was used and removed USB 3.0 NEC Renesas upd720200 PCI card 
[1033:0194], which was partially workable under my installation of Ubuntu 18.04 
and Windows. It had problems from time to time with FW load from card on start 
and not detecting USB devices connected even if FW present.
  I tried and also removed USB 3.0 NEC Renesas upd720202 PCI card [1912:0015] 
which also was partially workable in the same way (other card bios and newer 
NEC chip). System was fully bootable with NEC cards.

  The Etron EJ168 works superb on Windows OS's with directly or with hub 
connections with USB devices.
  I can assist in any way to solve this bug as IT Professional.

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