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 -- 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
