$ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date 6.80 10/01/2013
I have updated the bios. but I'm still getting the same ACPI errors on dmesg output. I noticed this error on dmesg output on both ubuntu and archlinux many times: usb 1-3: device not accepting address 4, error -71 this error is a protocol error (-71: -EPROTO[0]) and it's mostly caused by hardware/firmware issues or some unknown errors[1] On my archlinux, I'm using linux-lts 3.10.39 & connman/ofono, I didn't get this kernel bug, but, the connection is unstable and the usb modem disconnect many times I have tested other usb devices and I got the same -EPROTO error message. So, the issue is on the host side. but I can not confirm if it's caused by the hardware or the firmware. Maybe if i got time in coming days, I will try to look into the ACPI DSDT code [0] https://www.kernel.org/doc/Documentation/usb/error-codes.txt [1] https://bugzilla.kernel.org/show_bug.cgi?id=6078 ** Bug watch added: Linux Kernel Bug Tracker #6078 http://bugzilla.kernel.org/show_bug.cgi?id=6078 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1308537 Title: [usb_wwan] unable to handle kernel NULL pointer dereference To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1308537/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
