Anyone have any further comment on this one? I've just come crashing
into the same problem - clean install of 14.04 Xubuntu on an MSI
H97M-G43 motherboard, and all is well until I connect my 2x460e and
2x290e tuners. At that point, I can watch the USB devices drop off as
the xHCI subsystem dies.... it's like that scene from Terminator 2 as
the red light slowly fades on my mouse... :-(

Nov  8 17:42:17 Server kernel: [   95.306697] xhci_hcd 0000:00:14.0: xHCI host 
not responding to stop endpoint command.
Nov  8 17:42:17 Server kernel: [   95.306706] xhci_hcd 0000:00:14.0: Assuming 
host is dying, halting host.
Nov  8 17:42:17 Server kernel: [   95.306829] em28174 #1: writing to i2c device 
at 0xaa failed (error=-5)
Nov  8 17:42:17 Server kernel: [   95.306837] xhci_hcd 0000:00:14.0: HC died; 
cleaning up

and then syslog fills up with:

Nov  8 17:42:17 Server kernel: [   95.307142] em28174 #1: writing to i2c device 
at 0xaa failed (error=-19)
Nov  8 17:42:17 Server kernel: [   95.307150] i2c i2c-16: tda10071: i2c wr 
failed=-19 reg=00 len=2
Nov  8 17:42:17 Server kernel: [   95.307163] em28174 #1: writing to i2c device 
at 0xaa failed (error=-19)
Nov  8 17:42:17 Server kernel: [   95.307170] i2c i2c-16: tda10071: i2c rd 
failed=-19 reg=3a len=2
Nov  8 17:42:17 Server kernel: [   95.307433] em28174 #0: writing to i2c device 
at 0xd8 failed (error=-19)
Nov  8 17:42:17 Server kernel: [   95.307440] i2c i2c-14: cxd2820r: i2c rd 
failed=-19 reg=10 len=1
Nov  8 17:42:17 Server kernel: [   95.307480] em28174 #2: writing to i2c device 
at 0xd8 failed (error=-19)
Nov  8 17:42:17 Server kernel: [   95.307485] i2c i2c-18: cxd2820r: i2c rd 
failed=-19 reg=10 len=1
Nov  8 17:42:17 Server kernel: [   95.326994] hid-generic 0003:051D:0002.0002: 
usb_submit_urb(ctrl) failed: -19
Nov  8 17:42:17 Server kernel: [   95.347130] hid-generic 0003:051D:0002.0002: 
usb_submit_urb(ctrl) failed: -19

... while lan0, sshd and everything non-USB keeps purring on nicely.

I've tried various kernels, all seem to have the same issue (although
I'm yet to try 3.13.3 or 3.13.4 as above, that's on my to-do):

user@NewServer:~$ ll /boot/vm*
-rw------- 1 root root 5807968 Nov  5 19:52 /boot/vmlinuz-3.12.32-031232-generic
-rw-r--r-- 1 root root 5798112 Nov  1 15:47 /boot/vmlinuz-3.13.0-32-generic
-rw------- 1 root root 5704000 Nov  8 19:40 /boot/vmlinuz-3.13.0-39-generic
-rw------- 1 root root 5810456 Nov  1 15:51 
/boot/vmlinuz-3.13.0-39-generic.efi.signed
-rw------- 1 root root 5927568 Apr 14  2014 /boot/vmlinuz-3.14.1-031401-generic
-rw------- 1 root root 6491024 Nov  2 23:47 
/boot/vmlinuz-3.18.0-031800rc3-generic

... one of which (the unsigned 3.13.0-39) I compiled myself,
modularising EHCI and xHCI and then blacklisting the latter. Sadly, this
just shut down all my USB ports, which is hardly convenient.

>From what I read, it's a fundamental issue with Linux and USB 3.0, and
the best way to resolve it is to disable xHCI at the BIOS level and then
fall back to EHCI/USB2 throughout. Sadly, the MSI board doesn't support
disabling xHCI, so that's not an option (although buying a different
mobo on which I can disable it - Gigabyte, for example - is looking
increasingly attractive).

Interestingly, the same tuners work perfectly on the same kernel
(3.13.0-39 backported to Precise) on an earlier revision of the same
board (H77MA-G43), so I don't know if it's chipset-related or just
'quirky'.

** Also affects: xubuntu-meta (Ubuntu)
   Importance: Undecided
       Status: New

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https://bugs.launchpad.net/bugs/1313279

Title:
  xHCI host not responding to stop endpoint command

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