On Tue, 25 Apr 2023 20:19:24 +0200, Jakub Kicinski wrote: > > Hi! > > For a few weeks now I can't use any USB devices if I suspend my laptop > with my USB sound card active and resuming it without it connected. > > USB worker threads seems to be sitting in: > > [<0>] snd_pcm_dev_disconnect+0x1e8/0x280 [snd_pcm] > [<0>] snd_device_disconnect_all+0x42/0x80 [snd] > [<0>] snd_card_disconnect+0x128/0x290 [snd] > [<0>] usb_audio_disconnect+0x11a/0x2c0 [snd_usb_audio] > [<0>] usb_unbind_interface+0x8c/0x270 > [<0>] device_release_driver_internal+0x1b2/0x230 > [<0>] bus_remove_device+0xd8/0x150 > [<0>] device_del+0x18b/0x410 > [<0>] usb_disable_device+0xc6/0x1e0 > [<0>] usb_disconnect+0xda/0x2c0 > [<0>] usb_disconnect+0xbf/0x2c0 > [<0>] usb_disconnect+0xbf/0x2c0 > [<0>] usb_disconnect+0xbf/0x2c0 > [<0>] hub_event+0xf01/0x1cd0 > [<0>] process_one_work+0x1c4/0x3d0 > [<0>] worker_thread+0x4d/0x380 > [<0>] kthread+0xe6/0x110 > [<0>] ret_from_fork+0x29/0x50 > > Which is: > > snd_pcm_dev_disconnect (/usr/src/debug/kernel-6.2.12/linux-6.2.12-300.fc38.x86_64/sound/core/pcm.c:818 /usr/src/debug/kernel-6.2.12/linux-6.2.12-300.fc38.x86_64/sound/core/pcm.c:812 /usr/src/debug/kernel-6.2.12/linux-6.2.12-300.fc38.x86_64/sound/core/pcm.c:1129) snd_pcm > > It happens on Fedora 37 and Fedora 38, it seems to have coincided with > the 6.2 kernel but I'm not 100% sure. > > The USB devices come back after half an hour or so, silently. > There's nothing of note in dmesg. AFAIK, there has been no similar report, so far. Is it a regression? If yes, could you figure out which kernel version starts showing the problem (or at best bisection)? thanks, Takashi
