Kernel bug after removing Hauppauge WinTV-dualHD (em28xx/si2157)

[Morty]

This kernel bug happens right after removing the usb connector. No streams were running.

ProblemType: Bug
DistroRelease: Ubuntu 18.10
Package: linux-image-4.18.0-7-generic 4.18.0-7.8
ProcVersionSignature: Ubuntu 4.18.0-7.8-generic 4.18.5
Uname: Linux 4.18.0-7-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version k4.18.0-7-generic.
AplayDevices: Error: [Errno 2] No such file or directory: 'aplay': 'aplay'
ApportVersion: 2.20.10-0ubuntu11
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord': 'arecord'
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D2', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D8p', '/dev/snd/pcmC0D7p', '/dev/snd/pcmC0D3p', '/dev/snd/pcmC0D2c', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer': 'amixer'
Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer': 'amixer'
Date: Mon Oct 1 23:06:15 2018
HibernationDevice: RESUME=UUID=7185b930-4c2c-4378-ad3c-78672310683f
IwConfig:
 tun0 no wireless extensions.

 eth0 no wireless extensions.

 lo no wireless extensions.
MachineType: To Be Filled By O.E.M. To Be Filled By O.E.M.
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.18.0-7-generic root=/dev/mapper/hostname-root ro consoleblank=0 quiet noresume
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
RelatedPackageVersions:
 linux-restricted-modules-4.18.0-7-generic N/A
 linux-backports-modules-4.18.0-7-generic N/A
 linux-firmware 1.175
RfKill: Error: [Errno 2] No such file or directory: 'rfkill': 'rfkill'
SourcePackage: linux
UpgradeStatus: Upgraded to cosmic on 2018-10-01 (0 days ago)
dmi.bios.date: 03/31/2016
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: P1.30
dmi.board.name: J3160DC-ITX
dmi.board.vendor: ASRock
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrP1.30:bd03/31/2016:svnToBeFilledByO.E.M.:pnToBeFilledByO.E.M.:pvrToBeFilledByO.E.M.:rvnASRock:rnJ3160DC-ITX:rvr:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.family: To Be Filled By O.E.M.
dmi.product.name: To Be Filled By O.E.M.
dmi.product.sku: To Be Filled By O.E.M.
dmi.product.version: To Be Filled By O.E.M.
dmi.sys.vendor: To Be Filled By O.E.M.

[Ubuntu Kernel Bot (ubuntu-kernel-bot)]

This change was made by a bot.

[Joseph Salisbury (jsalisbury)]

Did this issue start happening after an update/upgrade? Was there a prior kernel version where you were not having this particular problem?

Would it be possible for you to test the latest upstream kernel? Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest v4.19 kernel[0].

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

Once testing of the upstream kernel is complete, please mark this bug as "Confirmed".

Thanks in advance.

[0] http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.19-rc6

[Morty (morty)]

This driver is in the kernel since 4.17 [1]. Before I used the media-tree backports[2], but had some issues (inkluding the reported bug) that I was hoping to get rid of. Though I can't say for sure wheter is was exactly the same. I just remember that a kernel bug showed up in dmesg.

I just did some superficial testing with the mainline kernel. Things seem better. I was able to unplug without issues when tvheadend was not running. But in combination with tvheadend things still seem to break something in the kernel. (See attached kernel log). To my untrained eye this seems like a different issue. I'll therefore mark this as kernel-fixed-upstream. Where should I file the new issue? "ubuntu-bug linux" said something about the issue caused by a package that is not installed.

[1] https://www.linuxtv.org/wiki/index.php/Hauppauge_WinTV-dualHD#Drivers
[2] https://github.com/b-rad-NDi/Ubuntu-media-tree-kernel-builder