Date: Mon, 07 Apr 2014 13:11:39 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: Johannes Meixner <xmj@chaot.net>, freebsd-hackers@freebsd.org Subject: Re: hw.acpi.reset_video behavior when multiple VGA cards are present Message-ID: <5342DC4B.1010908@FreeBSD.org> In-Reply-To: <20140405071627.GA83459@mx12.chaot.net> References: <20140405071627.GA83459@mx12.chaot.net>
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 2014-04-05 03:17:42 -0400, Johannes Meixner wrote: > Hi, > > I've originally posted the following to freebsd-acpi@ in February > but didn't get any replies, so maybe someone here can help me out. > > I've been trying to work out why my ASUS ZenBook can't work > correctly with S3 sleepstates. > > Resume works theoretically like a charm (I suspend with music > playing; the music stops and continues upon wakeup; I can reboot > the system blindly from command line). > > One thing that does not, however, is VGA resume. The screen will > just stay blank. > > So I looked into it a little and realized -- what's the expected > behaviour towards video reset when multiple VGA cards are present > (NVIDIA Optimus) with vgapci0 being the (unusable) NVIDIA board and > vgapci1 the (usable with Xorg, vt(9), KMS etc) Intel one? > > As in, which card does `hw.acpi.reset_video` actually reset the > video on? It tries to call the reset vector of video BIOS. In your configuration, it probably won't do anything at all. Jung-uk Kim -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQEcBAEBAgAGBQJTQtxLAAoJEHyflib82/FGacoIAINToymcwcJzEImiFcx6x8d6 DLwxo0IK1Qh388cJNFqnkR8KgpdPukF7TK/EeDiD1C/ONyvdIdyYMxM50m5KJgpB S+7kh0IgtsnqlSk6zlIWT+kO98U8fhOuvxIQiTmgnEGIbqKZGrx3/SEOUKcXF2BL qhGBUOpwdoXGp45ARKHLeQh/qIZtfBVehPOsHfrGX1iq7PVOarCV7emL0p5rWvEL 3aTbZvFl9HYlGTE85SdItpAcfzURXrqnesXp+HWy55qBR7EG4P+MMpsZ04IR+Ocd eUuq8GjP6Y/m9RP+TDZlAW9c7iqWVl+0+5+awGJ74KYWnOF1XYHT478/XqKtf2Q= =cDkQ -----END PGP SIGNATURE-----
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