See kernel-log-sandisk-inserted-after-pooweron.txt with the usb- storage.quirks=0781:55a9:u kernel argument (that matches a SanDisk USB 3.2 thumb drive). I can't see any activity in the kernel log when I plugged in that thumb drive.
Then I powercycled the MacBook Pro with the SanDisk drive left in the slot; when the computer booted the drive showed up as expected. See the attached kernel-log-sandisk-inserted-after-poweron.txt file for that log; note that the quirks command line wasn't required. Unplugging the SanDisk drive and re-connecting it fails, again without any kernel messages at all. I also tried another USB 3 thumb drive without result. ** Attachment added: "kernel-log-sandisk-inserted-at-poweron.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2115512/+attachment/5888053/+files/kernel-log-sandisk-inserted-at-poweron.txt -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2115512 Title: MacBook Pro USB 3.0 Devices Unrecognized To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2115512/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
