On Wed, 10 Aug 2016, Ritesh Raj Sarraf wrote: > Hi, > > [Please CC me in replies. I'm not subscribed to the list] > > For around a year, since I got this machine, I've run into this problem. I > never > reported the problem because it seemed to occur with the device (Card Reader) > that I didn't care much about. > > But now, it looks like the issue is hitting on my power saving measures. > > I've attached 2 files. ONe before the bug is triggered and the other after the > bug triggered. Interestingly, after the bug is triggered, there is no way to > find that device's listing under sysfs. It feels like the device got > hotplugged > and vanished.
The device was disconnected electronically. How often does this happen? After the disconnect occurs, does the card reader remain disconnected until the next power cycle? > Upon reboot too, I noticed the error reported way early during initrd. > > After a full poweroff and boot, the usb device was back to being listed as > normal. > > > Is this a sign of the USB device going bad? Probably. > Or is it just another bug in Linux USB? Another?? Are there other bugs affecting you? > If a sign of a faulty USB device, what measures can be taken as a user? Is it > possible to effectively disable such devices, so that they do not consume any > power at all ? Maybe your BIOS settings will let you disable it. Or you could try to open up the computer's case and disconnect the wires to the card reader. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
