On 2016-04-04 9:06:28, Olliver Schinagl wrote: > Hi list, > > I have a Apple Inc. MacBookPro11,1 (with the most recent 'bios': BIOS > MBP111.88Z.0138.B16.1509081438 09/08/2015). > At the beginning, USB worked normally. After a while (and after newer kernel > versions released by debian?) things started to act strangely. For one, the > bios/efi boot takes a very long time (probably due to the same reason I describe > later) just to get to the bootloader/grub. Likley resetting and probing for USB > ports/mass storage. When grub finally pops up, I can use the (internal USB based > keyboard) normally to select a grub entry etc. > Booting the kernel then works reasonably fine, until it loads the xhci module. > It spews some messages in dmesg (taking some 15 seconds) and only then, the > keyboard starts to work again. I have the same hardware and am having the same problem. For me, it works properly about half the time. I've discovered two things that might be helpful: (1) When I don't have the problem, I have an efivars entry /sys/firmware/efi/efivars/usb-cr-rec-7c436110-ab2a-4bbb-a880-fe41995c9f82 and when I do have the problem, this entry is not present. (AFAICT this is the only thing that changes in efivars, except for something that looks like a boot counter.) For the record: $ hexdump usb-cr-rec-7c436110-ab2a-4bbb-a880-fe41995c9f82 0000000 0006 8000 0001 0000 0000008 (2) Unlike (1) this is not a 100% correlation, but usually when it works properly, my internal keyboard turns up as /dev/input/event5, and when there's a delay, it turns up as event12, event13, or event14 (and this sometimes changes after suspend, when there's also a delay correlated to the boot delay). >From /proc/bus/input/devices when it works: I: Bus=0003 Vendor=05ac Product=0259 Version=0111 N: Name="Apple Inc. Apple Internal Keyboard / Trackpad" P: Phys=usb-0000:00:14.0-5/input0 S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/0003:05AC:0259.0001/input/input5 U: Uniq= H: Handlers=sysrq kbd event5 B: PROP=0 B: EV=120013 B: KEY=10000 0 0 0 1007b00011007 ff9f217ac14057ff ffbeffdfffefffff 7ffffffffffffffe B: MSC=10 B: LED=1f and when there is a delay, it looks the same, except with input13 / event13 instead of input5 / event5. Thanks, -- J.M. -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
