All of that depends on where the usb device locks up/crashes at. If the usb card reader locks up/crashes when it is attempting to use the usb bus then no one else can use it since it may stop functioning while applying a signal to the bus. This happens every so often on SAS, fiber channel, and scsi disks on a single shared channel (fairly rare, unless one has a lot of them). And very few computers have more than 1 or 2 actual usb buses. The card I have is reported to lie about what voltages it can use, and some of the readers ignore the voltage and some believe the cards. With the same kernel, one of my reader devices worked while the other got the failure to read you mention. But don't count on any given piece of hw/fw cleanly handling an error condition that it treats as should not happen. Mine that has issues on one but not the other is a SANDISK sdxc card. On Fri, Jun 26, 2020 at 1:26 PM Samuel Sieb <samuel@xxxxxxxx> wrote: > > On 6/26/20 10:01 AM, Roger Heflin wrote: > > What kind of usb card is it? You may want to google the specific card > > on linux and/or test other cards of different types. > > It was an SD card. I have seen various bug reports about the newer > categories, which, from the given logs, appears to be the case here. > The problem appears to be related to U1 or U2 modes. Usually it only > involves not being able to recognize or read the card. It's a rather > surprising interaction to take out the entire usb system. > _______________________________________________ > users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx > To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx > Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines > List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx
