Trying to Disable USB 3, no luck
Posted: 04 May 2015, 19:11
I have found that on some hardware, booting Porteus from a USB 3 drive is not working very reliably, and so I'd like to be able to disable USB 3 support in the linux kernel. But I don't really want to have to rebuild the kernel to get there, if I can avoid it.
I've figured out where to put kernel command-line parameters, but I can't find a parameter that actually keeps the USB ports running at 2.0 speeds when you have a 3.0 drive in them.
I've tried:
modprobe.blacklist=xhci_hcd
and I've tried:
xhci_hcd.blacklist=yes
and in both cases confirmed they were there with 'cat /proc/cmdline' yet the xhci_hcd driver was loaded anyway, and lsusb -t confirms that the drives are running at full, flaky 3.0 speed.
Any suggestions?
I've figured out where to put kernel command-line parameters, but I can't find a parameter that actually keeps the USB ports running at 2.0 speeds when you have a 3.0 drive in them.
I've tried:
modprobe.blacklist=xhci_hcd
and I've tried:
xhci_hcd.blacklist=yes
and in both cases confirmed they were there with 'cat /proc/cmdline' yet the xhci_hcd driver was loaded anyway, and lsusb -t confirms that the drives are running at full, flaky 3.0 speed.
Any suggestions?