Using camera after suspend makes the computer crash

[hpe009]

On Ubuntu using camera after suspend freezes the computer

[edsiper]

I'd assume this it's an expected behavior, the power management routines are not yet implemented:

https://github.com/patjak/bcwc_pcie/blob/master/fthd_drv.c#L520

[hpe009]

@edsiper Any way to go around this?

[edsiper]

do not suspend ? :)

[WhyNotHugo]

Probably unloading the module before suspending should prevent this too.

[hpe009]

@hobarrera Can you tell me how to do that? I have tried but I do not think I have done it right

[slashrsm]

modprobe -r facetimehd

[hpe009]

Any way I can put this in a script so that it launches the commands before sleep : modprobe -r facetimehd.
And on resume: modprobe -r bdc_pci and modprobe facetimehd?
@slashrsm

[wvengen]

If you're on Ubuntu (and perhaps Debian), edit /etc/default/acpi-support and add facetimehd to its MODULES variable.

[hpe009]

Solution. DEV @patjak please add to install description as workaround for now:
Create this file: sudo gedit
And paste this and save it to /lib/systemd/system-sleep/ And chmod it after you save it: sudo chmod a+x /lib/systemd/system-sleep/99facetimehd:

#!/bin/sh
case $1/$2 in
pre/)
echo "Going to $2..."
modprobe -r facetimehd
;;
post/)
echo "Waking up from $2..."
modprobe -r bdc_pci
modprobe facetimehd
modprobe bdc_pci
;;
esac

[patjak]

@hpe009 Thanks. Please add that to the wiki. The wiki is open for anyone to edit. Note that modprobe bdc_pci is not needed at post.

[hpe009]

@patjak Will do, added that line jsut in case.

[patjak]

@hpe009 Thanks

[derjohn]

@patjak

For Ubuntu trusty we need:

/etc/pm/sleep.d/99_facetimehd

#!/bin/sh

case $1 in
    resume|thaw)
        logger -t pm 'Loading facetimehd kernel module'
        /sbin/modprobe facetimehd
        ;;
    suspend|hibernate)
        logger -t pm 'Removing facetimehd kernel module'
        /sbin/rmmod facetimehd
        exit 0
        ;;
esac

[wvengen]

For Ubuntu we can use existing acpi-support functionality #37 (comment)

[derjohn]

@wvengen I did try to do it via /etc/default/acpi-support - setting MODULES. Didn't work for me. I use Linux Mint 17, which is based on trusty.

[hpe009]

@wvengen That does not work I have tried.

[wvengen]

@hpe009 thanks for reporting back, strange.
btw, the driver unloads/loads itself now at suspend/resume since b5e3e74