Re: Pinebook: possible backlight issue

[Lex Wennmacher <lex.wennmacher%gmx.de@localhost>]

On Fri, Nov 30, 2018 at 11:58:33AM -0800, Jason Thorpe wrote:
> > On Nov 30, 2018, at 11:54 AM, Lex Wennmacher <lex.wennmacher%gmx.de@localhost> wrote:
> > 
> > Here's what I did: I wrote Jared's image (I tried different versions)
> > to SD card and booted from that. I can tell that the kernel gets loaded
> > and run as I can see the keyboard leds flash and there's a cracking noise
> > after a certain time when the sound chip gets probed. But I don't get
> > any console messages or other output on the screen. No Pinebook cone, no
> > logo, rien, nothing, nada. As even in darkness no glow can be seen from
> > the display, I think that the backlight remains off during the entire boot
> > sequence.
> 
> I had exactly the same problem until I did the sequence described here while booted in Linux:
> 
> http://files.pine64.org/doc/pinebook/guide/Pinebook_Earphone_Serial_Console_Developer_Guide.pdf <http://files.pine64.org/doc/pinebook/guide/Pinebook_Earphone_Serial_Console_Developer_Guide.pdf>
> 
> I have no idea if it was coincidental or not, but the display came to life after that when boating NetBSD from the SD card.

I tried that (several times), but neither did it help with the display/
backlight issue nor did it switch earphone output to serial. The described
Linux command did not produce an error, it had no noticable effect. To switch
to serial I had to open the pinebook and toggle the little switch.