Bug#870641: light-locker: screen stays black after closing and opening laptop lid
Re: Yves-Alexis,
On Tue, Oct 23, 2018 at 05:29:02PM +0200, Yves-Alexis Perez wrote:
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> On Tue, 2018-10-23 at 08:07 -0700, Jeremiah Mahler wrote:
> > Re: Yves-Alexis,
> >
> > On Tue, Oct 23, 2018 at 11:01:21AM +0200, Yves-Alexis Perez wrote:
> > [...]
> > > On Mon, 2018-10-22 at 20:48 -0700, Jeremiah Mahler wrote:
> > > > I am experiencing this problem and I found a workaround ...
> > >
> > > Did you try the other workarounds (vt-switch back and forth)? Was it not
> > > working?
> > >
> >
> > Alt-F1, Ctrl-Alt-Backspace, etc, don't get me to the terminal prompt.
> > Maybe I'm using the wrong keys in Xfce?
>
> Try Ctrl-Alt-F1 then Ctrl-Alt-F8.
These don't work for me either.
> >
> > > > If I create an Xorg config file that says to use the Intel
> > > > driver it works.
> > >
> > > Interesting. There might be a bad interaction with the driver where it
> > > doesn't
> > > switch the backlight on or something.
> > > > Perusing the /var/log/Xorg.0.log finds that it was using the
> > > > fbdev driver before.
> > >
> > > Are you sure? I think Intel cards should be using the “modesetting” driver
> > > by
> > > default.
> > >
> >
> > Hmm, I found references to both fbdev and modesetting modules in the
> > Xorg.0.log (see attached).
>
> That's interesting indeed. Do you have multiple video adapters or just one?
> Can you try to remove xserver-xorg-video-fbdev and see what happens?
>
As far as I can tell I just have one video adapter.
It is just a laptop and I'm not using any external monitors.
$ lspci
00:00.0 Host bridge: Intel Corporation Skylake Host Bridge/DRAM Registers (rev 08)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 520 (rev 07)
00:08.0 System peripheral: Intel Corporation Skylake Gaussian Mixture Model
00:13.0 Non-VGA unclassified device: Intel Corporation Sunrise Point-LP Integrated Sensor Hub (rev 21)
00:14.0 USB controller: Intel Corporation Sunrise Point-LP USB 3.0 xHCI Controller (rev 21)
[...]
If I apt-get purge xserver-xorg-video-fbdev and remove
/etc/X11/xorg.conf.d/20-intel.conf the screen will lock
up as before.
With xserver-xorg-video-fbdev still removed, if I re-add
/etc/X11/xorg.conf.d/20-intel.conf then light-locker works
again.
Interestingly, xserver-xorg-video-modesetting is removed on
my system too.
> Regards,
> - --
> Yves-Alexis
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--
- Jeremiah Mahler
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