Am Dienstag, den 24.04.2018, 07:35 +0300 schrieb Nazar Mokrynskyi:
> I've tried to bisect kernels from 4.13 to 4.14 and didn't find the reason.
> Then I found that with upstream 4.13 the issue is still present on Ubuntu
> 18.04, so there should be something more than just a kernel.
>
> Eventually, I found that issue is somehow related to USB hub I use for my
> periferals (mouse, keyboard and sound card).
>
> When sound card is connected separately, it is properly initialized as USB
> 2.0 device: https://pastebin.com/0rv1aUBz
>
> However, when connected to USB hub, it initializes as USB 1.1 device, in
> which case it disables some of its capabilities, like 5.1 output mode:
> https://pastebin.com/i4qE9JTZ
>
> Can't blame USB hub for this, since when I unplug it with mentioned 3 devices
> and plug back - everything works fine, the issue only happens on system boot.
>
> USB hub I use at the moment (used another before with the same outcome):
> https://pastebin.com/wkA6D9TP
You need to make sure ehci/hcd is loaded before ohci or uhci, if indeed
you have a setup with true companion controllers. Which HCD are you
using?
Regards
Oliver
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