Lines Matching refs:USB

1 		USB device persistence during system suspend
10 According to the USB specification, when a USB bus is suspended the
16 If a USB device's power session is interrupted then the system is
23 By default, Linux behaves according to the spec.  If a USB host
30 If the kernel wants to believe that your USB keyboard was unplugged
47 firmware (i.e., the BIOS) resets the motherboard's USB host
49 it's as though you had unplugged all the USB devices.  Yes, it's
53 On many systems the USB host controllers will get reset after a
59 In practice, people are forced to unmount any filesystems on a USB
60 device before suspending.  If the root filesystem is on a USB device,
68 The kernel includes a feature called USB-persist.  It tries to work
69 around these issues by allowing the core USB device data structures to
72 It works like this.  If the kernel sees that a USB host controller is
75 to each of the USB devices below that controller for which the
77 can't work once the power session is gone.  Instead it issues a USB
79 same thing that happens whenever a USB device is reset.)  If the
87 but a USB device was unplugged and then replugged, or if a USB device
96 The end result is that the USB device remains available and usable.
100 Note that the "USB-persist" feature will be applied only to those
118 to plug in a USB flash device, create a persistent volume associated
121 it would be more far-reaching than USB-persist.
128 Furthermore, the USB-persist feature applies to _all_ USB devices, not
133 	WARNING: USB-persist can be dangerous!!
136 to make sure the USB device hasn't been changed; that is, the same
140 If you replace one USB device with another of the same type (same
147 Furthermore it's quite possible to leave a USB device exactly the same
149 USB card reader while the system is asleep, the kernel will have no
164 at all.  The USB-persist feature can be extremely useful.  Make the