I think, there was no error in dmesg, only message that new USB device was connected. Device was not activated (like LED powered on USB hub or flash disk):
[ 122.317106] usb 1-2: new full speed USB device using ohci_hcd and address 2 This is correct output when USB 1.1 hub is connected: [ 117.445692] usb 3-1: new full speed USB device using ohci_hcd and address 2 [ 117.550185] usb 3-1: configuration #1 chosen from 1 choice [ 117.551120] hub 3-1:1.0: USB hub found [ 117.554871] hub 3-1:1.0: 5 ports detected I cannot repeat the issue anymore, my motherboard works as expected now. I tried to install Fedora to have some distribution with the latest kernel. I was able to reproduce USB issue at Fedora too. As the Fedora was very unstable and kernel crashed frequently, I reset my BIOS setting after several reboots. And from that point PC is stable and USB issue was fixed. I was able to install Fedora from DVD without any problem but I received several crashes during time when I updated Fedora packages from the Internet. After several crashes I reset BIOS setting, from that time PC was stable, I was able to finish Fedora update. I found today that USB issue is fixed, too. From this point it looks as a HW configuration issue. Very confusing was that USB 2.0 devices worked but 1.x devices was not working. This is new PC and I had problem with USB from the begging. I thought that my motherboard is damaged too (USB card reader was not working, etc). When I found that USB 2.0 device works without any problem it looked as Linux issue. ** Attachment added: "lspci -vvnn, issue is fixed now." http://launchpadlibrarian.net/21502606/lspci_vnn.txt -- AMD 780G motherboard doesn't work with USB 1.1 devices (2.0 devices are OK) https://bugs.launchpad.net/bugs/319403 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
