Comment 1 Graham Perrin 2020-12-24 09:45:16 UTC

Does any of this help? 

----

# date 
Thu Dec 24 08:51:35 GMT 2020
# sysrc rc_debug=NO
rc_debug: YES -> NO
# service webcamd status
webcamd is not running.
# ls -hl /var/run/webcamd.*.0.pid
-rw-------  1 root  wheel     5B Dec 24 08:47 /var/run/webcamd.1.3.0.pid
# rm /var/run/webcamd.*.0.pid
# service webcamd status
webcamd is not running.
# service webcamd start
Starting webcamd.
# service webcamd status
webcamd is not running.
# rm /var/run/webcamd.*.0.pid
rm: /var/run/webcamd.*.0.pid: No such file or directory
# kldstat | grep cuse
65    1 0xffffffff83b6d000     6730 cuse.ko
# kldunload cuse
# kldload cuse
# kldstat | grep cuse
65    1 0xffffffff83b6d000     6730 cuse.ko
# kldunload cuse
# kldstat | grep cuse
# kldload cuse
# kldstat | grep cuse
65    1 0xffffffff83b6d000     6730 cuse.ko
# service webcamd status
webcamd is not running.
# service webcamd start
Starting webcamd.
# service webcamd status
webcamd is not running.
# ls -hl /var/run/webcamd.*.0.pid
ls: /var/run/webcamd.*.0.pid: No such file or directory
# webcamd -l | sort
Available device(s):
Show webcamd usage:
webcamd -h
webcamd [-d ugen0.1] -N 0x8086-XHCI-root-HUB -S unknown -M 0
webcamd [-d ugen0.2] -N vendor-0x0424-product-0x5434 -S unknown -M 0
webcamd [-d ugen0.3] -N Logitech-USB-Trackball -S unknown -M 0
webcamd [-d ugen0.4] -N vendor-0x03f0-HP-USB-Slim-Keyboard -S unknown -M 0
webcamd [-d ugen0.6] -N SMSC-USB5534 -S 1239567 -M 0
webcamd [-d ugen0.7] -N StoreJet-Transcend-StoreJet-Transcend -S X3E1SAKRS -M 0
webcamd [-d ugen0.8] -N SteelSeries-SteelSeries-Siberia-350 -S unknown -M 0
webcamd [-d ugen1.1] -N Intel-EHCI-root-HUB -S unknown -M 1
webcamd [-d ugen1.2] -N vendor-0x8087-product-0x0024 -S unknown -M 0
webcamd [-d ugen1.3] -N Chicony-Electronics-Co---Ltd--HP-HD-Webcam-Fixed -S SN0001 -M 0
webcamd [-d ugen1.4] -N vendor-0x0424-product-0x2514 -S unknown -M 0
webcamd [-d ugen1.6] -N HP-HP-hs2350-HSPA--MobileBroadband -S 9F5C9DB7AE4197M0 -M 0
webcamd [-d ugen2.1] -N Intel-EHCI-root-HUB -S unknown -M 0
webcamd [-d ugen2.2] -N vendor-0x8087-product-0x0024 -S unknown -M 1
webcamd [-d ugen2.3] -N Broadcom-Corp-BCM20702A0 -S B8763FD8EF34 -M 0
# webcamd -N Chicony-Electronics-Co---Ltd--HP-HD-Webcam-Fixed -S SN0001 -M 0
alloc_chrdev_region: Unknown region name: 'lirc'
webcamd 37259 - - Attached to ugen1.3[0]
webcamd 37259 - - Creating /dev/video0
webcamd 37259 - - Creating /dev/video1
^C
# ls -hl /var/run/webcamd.*.0.pid
-rw-------  1 root  wheel     5B Dec 24 08:54 /var/run/webcamd.1.3.0.pid
# rm /var/run/webcamd.*.0.pid
# service webcamd status
webcamd is not running.
# service webcamd start
Starting webcamd.
# service webcamd status
webcamd is not running.
# webcamd -N Chicony-Electronics-Co---Ltd--HP-HD-Webcam-Fixed -S SN0001 -M 0
alloc_chrdev_region: Unknown region name: 'lirc'
webcamd 37408 - - Attached to ugen1.3[0]
webcamd 37408 - - Creating /dev/video0
webcamd 37408 - - Creating /dev/video1
^C^C^C^C^C
load: 1.42  cmd: webcamd 37408 [W] 63.14r 0.07u 0.15s 0% 10152k
mi_switch+0xc1 sleepq_timedwait+0x2f _sleep+0x1ab pause_sbt+0xfe cuse_server_free+0x3c devfs_fpdrop+0xa3 devfs_close_f+0x44 _fdrop+0x11 closef+0x278 fdescfree_fds+0xdc fdescfree+0x3ec exit1+0x42b sigexit+0x133 postsig+0x251 ast+0x337 doreti_ast+0x1f 

# 

----

During the second manual run of webcamd I confirmed usability in Firefox at https://talky.io/usb-audio-freebsd and (I guess this is normal) Control-C was not effective until I closed the tab in Firefox.

Comment 2 Graham Perrin 2020-12-24 11:41:42 UTC

Created attachment 220889 [details]
Photograph of ttyv1 after leaving KDE Plasma and stopping sddm

Photographed
============

I left KDE Plasma, stopped sddm then retried a start of the service: 

* webcamd did not run. 

After restarting the computer: webcamd ran normally. 


Not photographed
================

I restarted the computer, refrained from using KDE, stopped sddm, stopped the service, tried to start the service: 

* webcamd did not run. 

After restarting the computer: webcamd ran normally.

Comment 3 Hans Petter Selasky 2020-12-24 11:42:04 UTC

What does:

pgrep -d ' ' webcamd

Output?

--HPS

Comment 4 Hans Petter Selasky 2020-12-24 11:44:21 UTC

It might be that webcamd has crashed. Do you have any "webcamd.core" files in your file system?

--HPS

Comment 5 Hans Petter Selasky 2020-12-24 12:04:51 UTC

Try to compile the webcamd port with debugging enabled.

Then start webcamd in the foreground (should also be picked up by the rc.d script's status).

Try to see if a core dump may be generated.

--HPS

Comment 6 Graham Perrin 2020-12-24 13:25:50 UTC

$ whoami
grahamperrin
$ pwd
/home/grahamperrin
$ ls -hl *.core
-rw-------  1 grahamperrin  grahamperrin    41M 24 Dec 03:38 kglobalaccel5.core
$ ls -hl /root/*.core
ls: /root/*.core: No such file or directory
$ su -
Password:
root@mowa219-gjp4-8570p:~ # pgrep -d ' ' webcamd
root@mowa219-gjp4-8570p:~ # 

(In reply to Hans Petter Selasky from comment #5)

Thanks, I'll try that: 

----

root@mowa219-gjp4-8570p:~ # sh
# cd /usr/local/poudriere/ports/default/multimedia/webcamd/
# ls -hl
total 23
-rw-r--r--  1 root  wheel   2.6K Dec  2 17:27 Makefile
-rw-r--r--  1 root  wheel   376B Dec  2 17:27 distinfo
drwxr-xr-x  2 root  wheel     4B Dec  3 05:54 files
-rw-r--r--  1 root  wheel   377B Dec  2 11:29 pkg-descr
-rw-r--r--  1 root  wheel   554B Nov 30  2019 pkg-message
-rw-r--r--  1 root  wheel   1.3K May 12  2014 pkg-plist
# grep -i debug Makefile 
OPTIONS_DEFINE= DEBUG HAL VT_CLIENT VT_SERVER DVB INPUT KEYBOARD MOUSE RADIO WEBCAM
DEBUG_MAKE_ARGS=        HAVE_DEBUG="YES"
# 

----

– should I create a Makefile.local and if so, what should it contain?

Comment 7 Hans Petter Selasky 2020-12-24 15:09:07 UTC

Just enable the debug option before compiling.

Comment 8 Graham Perrin 2020-12-24 17:32:58 UTC

(In reply to Hans Petter Selasky from comment #7)

I added this to the Makefile before building with poudriere: 

MAKE_ARGS+=     DEBUG="YES"

I'm probably wrong. Sorry for my lack of expertise.

Comment 9 Graham Perrin 2020-12-25 19:49:06 UTC

I think I now have it built with debugging support. This in /etc/make.conf –

WITH_DEBUG_PORTS=webcamd

– before I built with poudriere. 

No core dump when I run this: 

# webcamd -N Chicony-Electronics-Co---Ltd--HP-HD-Webcam-Fixed -S SN0001 -M 0
alloc_chrdev_region: Unknown region name: 'lirc'
webcamd 75412 - - Attached to ugen1.3[0]
webcamd 75412 - - Creating /dev/video0
webcamd 75412 - - Creating /dev/video1
^C
#

Comment 10 Graham Perrin 2021-01-01 20:10:49 UTC

I see recent <https://svnweb.freebsd.org/ports?view=revision&revision=559567> relating to kld, cuse(3) and virtual_oss … 

… is that, in any way, food for thought for this webcamd bug?

Thanks

In /usr/local/etc/rc.d/webcamd it says:

# By default webcamd instances are invoked by the devd(8) system
# daemon and you do not normally need to do any extra configuration
# just restart the devd service. If the devd service is not enabled,
# you need to add instances of "webcamd_N_flags=" which contain at
# least one of the "-d", "-D", "-N", or "-S" options.

If one wants to start a webcamd directly for a specific device, that device would have to be specified:

service webcamd start ugen1.3

Does this help?

-- Martin

Isn't webcamd supposed to be started by devd?
/usr/local/etc/devd/webcamd.conf

Comment 13 Graham Perrin 2021-02-10 09:05:58 UTC

This morning: 

Webcams with FreeBSD-CURRENT and an HP EliteBook 8570p : freebsd
<https://old.reddit.com/r/freebsd/comments/lgpsmv/-/>

tl;dr

*   the Microsoft webcam that certainly works (with Linux) 
    does not work with FreeBSD at <https://webcamtests.com/>

*   webcamd crashed.

Realistically: until I get a webcam working, again, with FreeBSD, it might be difficult for me progress this bug. Sorry!

Comment 14 Graham Perrin 2021-02-10 09:14:45 UTC

root@mowa219-gjp4-8570p:~ # service -e 
/etc/rc.d/rctl
/etc/rc.d/hostid
/etc/rc.d/zpool
/etc/rc.d/zvol
/etc/rc.d/hostid_save
/etc/rc.d/zfsbe
/etc/rc.d/zfs
/etc/rc.d/cleanvar
/etc/rc.d/ip6addrctl
/usr/local/etc/rc.d/vboxnet
/etc/rc.d/autounmountd
/etc/rc.d/mixer
/etc/rc.d/devmatch
/etc/rc.d/netif
/etc/rc.d/devd
/etc/rc.d/resolv
/usr/local/etc/rc.d/sndiod
/etc/rc.d/dmesg
/etc/rc.d/newsyslog
/etc/rc.d/os-release
/etc/rc.d/gptboot
/etc/rc.d/motd
/etc/rc.d/virecover
/etc/rc.d/cleartmp
/etc/rc.d/linux
/etc/rc.d/syslogd
/etc/rc.d/savecore
/etc/rc.d/automountd
/etc/rc.d/automount
/etc/rc.d/powerd
/usr/local/etc/rc.d/dbus
/usr/local/etc/rc.d/webcamd
/etc/rc.d/ntpd
/usr/local/etc/rc.d/cupsd
/etc/rc.d/cron
/usr/local/etc/rc.d/bsdstats
/etc/rc.d/sshd
/usr/local/etc/rc.d/sddm
/etc/rc.d/bgfsck
/etc/rc.d/sendmail
root@mowa219-gjp4-8570p:~ #

Comment 15 Hans Petter Selasky 2021-02-10 09:20:06 UTC

Which version of webcamd are you using?

Can you open the core dump with GDB from ports, and get the crashing backtrace?

Try also building webcamd with DEBUG option.

--HPS

On another note, daemons that discard privileges do not dump the core.
We need to change the location to writable directory in /etc/sysctl.conf where we want the core to be dumped.
I have set the following full course :).
kern.corefile=/tmp/%N.%U.%P.%I.core
The % substitution is explained in core(5) manpage.

Comment 17 Graham Perrin 2021-02-10 21:36:24 UTC

(In reply to Hans Petter Selasky from comment #15)

Thanks, I don't recall seeing a core file. If there was one, I might have removed it (sorry). 

I have this in my /etc/make.conf

WITH_DEBUG_PORTS=webcamd

– but I haven't installed from ports recently. 

% pkg query '%o %v %R' webcamd
multimedia/webcamd 5.10.6.0_1 FreeBSD
% pkg info webcamd | grep stalled
Installed on   : Tue Feb  9 01:06:28 2021 GMT
% 

I'll build and install now but I might not find time to retest until later in the week, or the weekend. 

In the meantime, <https://old.reddit.com/r/freebsd/comments/lgpsmv/webcams_with_freebsdcurrent_and_an_hp_elitebook/gmssxev/> does the observation of bsdsisks using 100% CPU offer any clue?

(In reply to Graham Perrin from comment #17)

I felt that WITH_DEBUG_PORTS had to be written like WITH_DEBUG_PORTS=multimedia/webcamd .

More simply, WITH_DEBUG=yes all ports are built for debugging.

Comment 19 Graham Perrin 2021-02-11 13:19:26 UTC

This morning, 

Feb 11 11:12:53 mowa219-gjp4-8570p kernel: ugen0.4: <Creative Technology Ltd. Creative WebCam Live Motion> at usbus0
Feb 11 11:12:54 mowa219-gjp4-8570p kernel: pid 8586 (webcamd), jid 0, uid 0: exited on signal 10 (core dumped)

I found the dumps, 

% ls -hl /*.core
-rw-------  1 root  wheel    67M  3 Feb 06:29 /bsdisks.core
-rw-------  1 root  wheel    12M 11 Feb 11:12 /webcamd.core
% 

– but nothing useful in the latter: 

root@mowa219-gjp4-8570p:/ # gdb attach /webcamd.core
GNU gdb (GDB) 10.1 [GDB v10.1 for FreeBSD]
Copyright (C) 2020 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Type "show copying" and "show warranty" for details.
This GDB was configured as "x86_64-portbld-freebsd14.0".
Type "show configuration" for configuration details.
For bug reporting instructions, please see:
<https://www.gnu.org/software/gdb/bugs/>.
Find the GDB manual and other documentation resources online at:
    <http://www.gnu.org/software/gdb/documentation/>.

For help, type "help".
Type "apropos word" to search for commands related to "word"...
attach: No such file or directory.
[New LWP 102249]
[New LWP 107804]
[New LWP 107805]
[New LWP 107806]
[New LWP 107807]
[New LWP 107808]
Core was generated by `/usr/local/sbin/webcamd -i 0 -d ugen0.4 -H -B -U webcamd -G webcamd'.
Program terminated with signal SIGBUS, Bus error.
#0  0x00000000005b7a90 in ?? ()
[Current thread is 1 (LWP 102249)]
(gdb) bt
#0  0x00000000005b7a90 in ?? ()
#1  0x0000000000000001 in ?? ()
#2  0x00000000000000d8 in ?? ()
#3  0x0000000000000000 in ?? ()
(gdb) q


(In reply to Tatsuki Makino from comment #18)

> WITH_DEBUG_PORTS=multimedia/webcamd

Thanks, I updated my /etc/make.conf then rebuilt and reinstalled. 

----

root@mowa219-gjp4-8570p:/ # service webcamd start
Starting webcamd.
root@mowa219-gjp4-8570p:/ # service webcamd status
webcamd is not running.
root@mowa219-gjp4-8570p:/ # 

– I'll restart the computer and maybe get another crash of webcamd.

Comment 20 Hans Petter Selasky 2021-02-11 14:51:50 UTC

Please install the GDB from ports and use that gdb instead.

Repeat.

Thank you!

--HPS

Comment 21 Graham Perrin 2022-03-17 06:41:44 UTC

(In reply to Hans Petter Selasky from comment #20)

My apologies for this bug languishing. 

----

A side note, as background: my use of cameras on FreeBSD became almost non-existent, because the primary use case is Microsoft Teams – and audio in Chromium was (for me) useless. More recently <https://forums.freebsd.org/posts/558170> there's hope of useful audio, so I'm close to regaining enthusiasm and headspace for this bug report.

Comment 22 Hans Petter Selasky 2022-03-17 12:36:03 UTC

I wonder if this issue is a duplicate of a bug that was fixed in webcamd recently:

multimedia/webcamd: Update version to 5.13.2.8
- Fix use-before-init memory bug in UVC driver.


Sorry, no PR.



Regarding chrome and teams I needed to install virtual_oss and recompile chrome with ALSA backend support. Else the audio goes bad :-)

--HPS