Bug#918142: linux-image-4.19.0-1-amd64: Can no longer disable the touchscreen module

[fakefur]

hi again

sorry i did not reassign it to udev - the kernel people did

i disable hid_multitouch but it is still enabled unless i disable
usbhid - this is the problem i'm having

"modprobe -r hid_multitouch" DOES NOT disable the touch screen

only "modprobe -r usbhid" disables it, but also disables all hid usb
devices

in previous kernels "modprobe -r hid_multitouch" worked and disabled
the touchscreen

of course i added it to the blacklist as that worked at boot each time
but has stopped working with 4.18 and 4.19 kernels, so i reported a
kernel issue but they reassigned it to udev

i do not know why



On Tue, 2019-01-08 at 14:27 +0100, Michael Biebl wrote:
> Am 08.01.19 um 14:19 schrieb fakefur:
> > as requested
> > thanks
> > 
> > 
> > lauren at THINKY:~$ lsmod | grep hid_multitouch
> 
> Ok, so the module is not loaded.
> 
> > lauren at THINKY:~$ grep hid_multitouch /etc/modprobe.d/*
> > /etc/modprobe.d/blacklist.conf:blacklist hid_multitouch
> > 
> > lauren at THINKY:~$ lsinitramfs /boot/initrd.img-$(uname -r) | grep
> > modprobe
> > etc/modprobe.d
> > etc/modprobe.d/blacklist.conf
> > etc/modprobe.d/thinkfan.conf
> > usr/lib/modprobe.d
> > usr/lib/modprobe.d/aliases.conf
> > usr/lib/modprobe.d/fbdev-blacklist.conf
> > usr/lib/modprobe.d/systemd.conf
> > usr/sbin/modprobe
> > 
> > What happens if you manually unload hid_multitouch
> > > and then run # modprobe hid_multitouch
> > yes this loads it
> 
> Sorry, I actually wanted you to try "modprobe -b", so the blacklist
> is
> expected.
> But as you've shown above, the blacklist is actually respected by
> udev.
> 
> I thus don't see a problem in udev's way of loading the modules.
> 
> Ben, can you elaborate why you reassigned this to udev?
> Maybe I'm missing something obvious.
> 
> Regards,
> Michael
> 
> > as i mentioned before unloading this module does not disable the
> > touchscreen - i have to unload usbhid to get the touchscreen
> > disabled,
> > which of course disables usb mice but i'm using bluetooth for now
> > so i
> > can live with this
> >  
> > hth
> > :)
> > 
> > On Tue, 2019-01-08 at 12:58 +0100, Michael Biebl wrote:
> > > On Fri, 04 Jan 2019 10:19:06 +0100 fakefur <fakefur at gmail.com>
> > > wrote:
> > > > makes no difference
> > > > i cannot disable the touchscreen
> > > > 
> > > 
> > > By "cannot disable the touchscreen", I assume you mean that the
> > > hid_multitouch kernel module is loaded?
> > > 
> > > What's the output of
> > > # lsmod | grep hid_multitouch
> > > # grep hid_multitouch /etc/modprobe.d/*
> > > # lsinitramfs /boot/initrd.img-$(uname -r) | grep modprobe
> > > What happens if you manually unload hid_multitouch
> > > and then run
> > > # modprobe hid_multitouch
> > > 
> > > Is the module loaded or not?
> 
>