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List:       openbsd-bugs
Subject:    Re: Blank screen when X is started after suspend/resume
From:       Mark Kettenis <mark.kettenis () xs4all ! nl>
Date:       2014-06-06 8:32:01
Message-ID: 201406060832.s568W1OB023004 () glazunov ! sibelius ! xs4all ! nl
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> Date: Thu, 5 Jun 2014 23:26:24 -0400 (AMT)
> From: dududa@gmail.com
> 
> >Synopsis:	If X is started anytime after resume, screen goes blank
> >Category:	system amd64
> >Environment:
> 	System      : OpenBSD 5.5
> 	Details     : OpenBSD 5.5-current (GENERIC.MP) #166: Tue Jun  3 21:09:08 MDT 2014
> 			 deraadt@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
> 
> 	Architecture: OpenBSD.amd64
> 	Machine     : amd64
> >Description:
> 	If X is started anytime after suspend/resume, screen goes blank
> in ttyC4 and stays off (even backlight is off), but X keeps responsive
> as I am able to leave it by pressing blindly "CMS-q" in cwm. 
> 	It's possible to change terminals and the other ttyC# work fine.
>         Restarting X doesn't help. /var/log/message and Xorg.0.log shows
> nothing unusual.
> 
> >How-To-Repeat:
> 	Suspend (zzz or lid), resume, startx.
> 
> >Fix:
> 	Only rebooting allows use X again.
> 	Suspend/resume after X is already started works fine.
> 	Starting X before suspend/resume also works fine.

Known problem.  Almost certainly a bug in the (Linux) drm code.  Not
obvious where though.  Not really high on my priority list to fix this
though.  Kinda hope that this will disappear all by itself at some
point if/when we update the drm code to a more recent version.

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