freebsd stable - Sep 2014 - vt does not resume properly after zzz [related powerpc64/GENERIC64 report?]

On Mon, Sep 29, 2014 at 1:20 PM, <marekrud at gmail.com> wrote:
> Hi all,
>
> I have configured vt by adding `kern.vty=vt' to /boot/loader.conf.
>
> After suspending the system using zzz and resuming, I can only see black
> screen.  The system seem to be running, but the display is off.  I was
> able to reproduce it on two different computers running 10.1-BETA2 and
> 10.1-BETA3.
>
> Is there a simple way to fix it?  Should I report it to Bugzilla?
>
> Thank you for help!
>
> Marek
>
https://lists.freebsd.org/pipermail/freebsd-ppc/2014-September/007204.html (from
Sept. 13) may be related to this report. It was titled:
> For newer XOrg/drivers powerpc64/GENERIC64 for NVIDIA no longer crash but
Option-Fn gets nearly black text on black background

Its details were then (some [...] notes added)...
> I've updated to ports r368074 which updated Xorg, the drivers, and even
gcc (to 4.8.3). I used portmaster -t -D -a. This was on both...
> 
> FreeBSD FBSDG4S0 10.1-PRERELEASE FreeBSD 10.1-PRERELEASE #0 r271215: Sat
Sep  6 23:56:15 PDT 2014     root at FBSDG4S0:/usr/obj/usr/src/sys/GENERIC 
powerpc
> 
> FreeBSD FBSDG5S0 10.1-PRERELEASE FreeBSD 10.1-PRERELEASE #0 r271278: Mon
Sep  8 12:40:56 PDT 2014     root at FBSDG5S0:/usr/obj/usr/src/sys/GENERIC64 
powerpc
> 
> both being booted on Quad Core G5 PowerMacs with the GeForce 7800 GT's
to update and rebooted to test. (Both of these SSDs are builds for
WITH_DEBUG_FILES= and WITHOUT_CLANG= and WITH_DEBUG= in /etc/make.conf.)
> 
> The powerpc/GENERIC worked find for Option-Fn use.
> 
> The powerpc64/GENERIC64 appeared to have the black screen issue. [Prior
versions had a crash that left the screen black and this wording refers to that
older context where the server was quitting and a core was being left behind.]
But...
> 
> ... I noticed something for powerpc64/GENERIC64 due to the lighting being
different than earlier [where I had assumed that the crash was still present]:
> 
> Option-Fn is(!) displaying the VTn display but just extremely faintly:
instead of the text being a fairly bright white against a black background for
powerpc64/GENERIC64 the text is nearly the same black color as the background.
But it is slightly lighter and in properly set up conditions I can read it. (It
may be monitor dependent on if there is enough of a difference to actually see
it that well.) Option-F9 gets back to xfce4's display just fine too.
> 
> The powerpc64/GENERIC64 Xorg crash is gone as of this update. [Again
referring to the older version's crash problem on PowerMacs.]
> 
> I've not tried other contexts yet. (Such as NVIDIA GeForce4 Ti 4600 on
a PowerMac G4.)
> 
> 
> Side notes:
> 
> Because historically I've had lots of problems with gcc
(re)builds/updates on powerpc or powerpc64 otherwise, I have the full-bootstrap
option enabled for building lang/gcc.
> 
> The only reason [that I] use WITHOUT_CLANG= is because I get failures
otherwise when WITH_DEBUG_FILES= is enabled. Specifically: ...
/libclangsema.a(SemaAccess.o): Unknown relocation type ????? for symbol *UND*
powerpc/GENERIC was then and is now still syscons by default.
powerpc64/GENERIC64 for .../stable/10/sys/powerpc/conf/GENERIC64 switched to vt
as the default on Sept. 4 (r271111 MFC'd r265871). At the time I had not
noticed the changed status and so was incorrectly thinking syscons throughout
the note.

==Mark Millard
markmi at dsl-only.net