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 Sincerely, Nazar Mokrynskyi github.com/nazar-pc 20.04.18 01:58, Nazar Mokrynskyi пише: > Still an issue as of 4.17-rc1 for sound card. > > Sincerely, Nazar Mokrynskyi > github.com/nazar-pc > > 17.03.18 19:04, Nazar Mokrynskyi пише: >> With kernel 4.16-rc5 it is still happening to USB sound card, Android phone >> issue was probably related to something else and is already fixed. >> >> Very annoying to unplug sound card after each reboot, any ideas why this >> might happen? >> >> Sincerely, Nazar Mokrynskyi >> github.com/nazar-pc >> >> 13.02.18 01:26, Nazar Mokrynskyi пише: >>> Starting from 4.14 and continuing in 4.15 I observe 2 bugs that I think are >>> related and didn't exist in 4.13. >>> >>> The first would be more difficult to reproduce: USB sound card Creative SB >>> Omni Surround 5.1 after system boot only shows 2.0 stereo output option, >>> while it also supports 5.1 and PulseAudio configured accordingly. If unplug >>> and plug it back in, 5.1 mode appears and I can select between 2.0 and 5.1. >>> You can boot with stock Ubuntu 17.10 and 18.04 as of right now and the >>> first one will work properly and second one will have mentioned bug. >>> >>> Second bug is easier to reproduce: when connecting Nexus 6P via USB cable, >>> it appears in file manager devices list (Nemo, Nautilus, etc.), but when it >>> is unplugged it doesn't disappear when running kernels 4.14 and 4.15. I >>> have 7 Nexus 6P entries already, unplugging and plugging back looks like >>> this: >>> >>> [200038.821988] usb 3-1: new high-speed USB device number 4 using xhci_hcd >>> [200039.043611] usb 3-1: New USB device found, idVendor=18d1, idProduct=4ee1 >>> [200039.043612] usb 3-1: New USB device strings: Mfr=1, Product=2, >>> SerialNumber=3 >>> [200039.043614] usb 3-1: Product: Nexus 6P >>> [200039.043614] usb 3-1: Manufacturer: Huawei >>> [200039.043615] usb 3-1: SerialNumber: 8XV7N16128000093 >>> [202243.949672] usb 3-1: USB disconnect, device number 4 >>> [205549.671959] usb 3-1: new high-speed USB device number 5 using xhci_hcd >>> [205549.893327] usb 3-1: New USB device found, idVendor=18d1, idProduct=4ee1 >>> [205549.893328] usb 3-1: New USB device strings: Mfr=1, Product=2, >>> SerialNumber=3 >>> [205549.893329] usb 3-1: Product: Nexus 6P >>> [205549.893329] usb 3-1: Manufacturer: Huawei >>> [205549.893330] usb 3-1: SerialNumber: 8XV7N16128000093 >>> [205550.602646] usb 3-1: USB disconnect, device number 5 >>> [205553.456007] usb 3-1: new high-speed USB device number 6 using xhci_hcd >>> [205553.680392] usb 3-1: New USB device found, idVendor=18d1, idProduct=4ee1 >>> [205553.680394] usb 3-1: New USB device strings: Mfr=1, Product=2, >>> SerialNumber=3 >>> [205553.680394] usb 3-1: Product: Nexus 6P >>> [205553.680395] usb 3-1: Manufacturer: Huawei >>> [205553.680396] usb 3-1: SerialNumber: 8XV7N16128000093 >>> [206021.635511] usb 3-1: USB disconnect, device number 6 >>> [206024.169853] usb 3-1: new high-speed USB device number 7 using xhci_hcd >>> [206024.392921] usb 3-1: New USB device found, idVendor=18d1, idProduct=4ee1 >>> [206024.392923] usb 3-1: New USB device strings: Mfr=1, Product=2, >>> SerialNumber=3 >>> [206024.392924] usb 3-1: Product: Nexus 6P >>> [206024.392925] usb 3-1: Manufacturer: Huawei >>> [206024.392925] usb 3-1: SerialNumber: 8XV7N16128000093 >>> [206034.058208] usb 3-1: USB disconnect, device number 7 >>> [206036.914005] usb 3-1: new high-speed USB device number 8 using xhci_hcd >>> [206037.136891] usb 3-1: New USB device found, idVendor=18d1, idProduct=4ee1 >>> [206037.136893] usb 3-1: New USB device strings: Mfr=1, Product=2, >>> SerialNumber=3 >>> [206037.136894] usb 3-1: Product: Nexus 6P >>> [206037.136895] usb 3-1: Manufacturer: Huawei >>> [206037.136895] usb 3-1: SerialNumber: 8XV7N16128000093 >>> [206080.923547] usb 3-1: USB disconnect, device number 8 >>> [206083.526585] usb 3-1: new high-speed USB device number 9 using xhci_hcd >>> [206083.752601] usb 3-1: New USB device found, idVendor=18d1, idProduct=4ee1 >>> [206083.752602] usb 3-1: New USB device strings: Mfr=1, Product=2, >>> SerialNumber=3 >>> [206083.752603] usb 3-1: Product: Nexus 6P >>> [206083.752604] usb 3-1: Manufacturer: Huawei >>> [206083.752605] usb 3-1: SerialNumber: 8XV7N16128000093 >>> >>> These 2 issues appeared at the same time, so I think they are related. >>> Let me know if you can't reproduce them and need any additional information >>> and CC me on answers as I'm not subscribed to this mailing list. >>> -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
