[Bug 106182] [Intel NUC] HDMI1 sometimes stops working after resuming from s3 (a single monitor setup)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106182

--- Comment #27 from Imre Deak <imre.deak at intel.com> ---
(In reply to Robert Liu from comment #26)
> Created attachment 139458 [details]
> dmesg for outb and inb commands #2
> 
> Well, the screen now is off. However, I cannot recover it by poweroff.
> A removal of the adapter is required to make the screen back.
> 
> It looks to me the behavior is slightly different from the issue has.

Yes, the sequence you tried just keeps the chip in reset you also need to
remove the reset condition to re-enable the display. If the following blanks
and unblanks the display for you when it's enabled properly, could you try it
again from the stuck state?

v=$(outb 0x66 0x80; outb 0x62 0x1a; inb 0x62)
echo $v
outb 0x66 0x81; outb 0x62 0x1a; outb 0x62 $(( v | 9 ))
outb 0x66 0x80; outb 0x62 0x1a; inb 0x62

sleep 0.1

outb 0x66 0x81; outb 0x62 0x1a; outb 0x62 $(( v & ~8 ))
outb 0x66 0x81; outb 0x62 0x1a; outb 0x62 $v

-- 
You are receiving this mail because:
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20180510/5544ae11/attachment.html>