Comment # 13 on bug 1004933 from John H.

(In reply to Luis Rodriguez from comment #12)
> (In reply to John H. from comment #11)
> > (In reply to Luis Rodriguez from comment #10)
> > > (In reply to John H. from comment #9)
> > > To this end I have had
> > > some changes I've made to firmware_class which I'd like you to test. Is it
> > > possible for you to test random kernel trees ?
> > > 
> > > If so can you test this branch ?
> > > 
> > > https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git/log/
> > > ?h=20170329-driver-data-v2-try2
> > 
> > havn't build a kernel in a while, but i'll try.
> 
> It would be appreciated, at this point this is an issue upstream, so we need
> to engage and fix that there and using upstream kernels will help a lot here.
> 
> If its hard for you to do this though let me know and I can provide some
> kernel builds, that will just take time though.
> 
> Note that using linux-next is very likely to not even boot, not due to a
> driver issue specific to this issue but also due to many churn in code not
> yet ironed out in line waiting to get upstream. So thanks for testing -- but
> if you run into issues with it don't be surprised.

boot? let's hope this commit will build (i used `make oldconfig`) :-). i'm away
most of the day, so don't expect a quick reply. if you want me to build a
kernel on a specific commit or specific .config, it's possible :-)

commit 5d920c893fc8ea957aa0489695a9f3dc62b13804
Author: Luis R. Rodriguez <mcgrof@kernel.org>
Date:   Wed Mar 29 05:36:37 2017 -0700

> > > > just had this while trying to access a tty
> > > > from X.
> > > 
> > > How exactly did this happen. You booted up, and after a while you switch to
> > > a tty from X ? No suspend / resume at all ?
> > 
> > no suspend / resume. i just wanted to switch to another runlevel so i
> > pressed ctrl + alt + f1 from X and then all rendering stopped because of the
> > above bug. i sshd into the machine and saw i had to reboot...
> 
> Using CTLR + ALT + F1 will not switch run levels, it will just spawn a tty
> for you. You can also use /usr/bin/chvt for the same these days as some
> distros do not allow to trap CTRL + ALT + F1 anymore.
> 
> The equivalent to CTRL + ALT + F1 now:
> chvt 1
> 
> And going back to CTRL + ALT + F7
> chvt 7

yep and from that spawned tty i wanted to do `sudo systemctl isolate
multi-user.target`