Date: Mon, 28 Feb 2005 09:39:20 -0800 From: David Horwitt <david@aogsquid.ucsd.edu> To: freebsd-mobile@freebsd.org Subject: Re: Using VESA to restore display settings on resume Message-ID: <42235748.8050403@aogsquid.ucsd.edu> In-Reply-To: <200502270431.aa10917@salmon.maths.tcd.ie> References: <200502270431.aa10917@salmon.maths.tcd.ie>
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Ian Dowse wrote: > It's possible that the experimantal patch below may help on some > notebooks where the display does not recover from a suspend-resume > cycle. It makes use of the VESA BIOS to save the display settings > before the system suspends and then restores them on resume. The > patch is against -CURRENT, but might apply against RELENG_5 without > too much trouble. > > I have a JVC laptop here where this is the only way I have found > so far to bring the LCD back to life after resuming, so maybe it > will help on other systems too. > > To test it, apply the patch and rebuild your kernel + modules. You > need to either have 'options VESA' in the kernel config or else > load the vesa module. It may also be worth trying with the > hw.acpi.reset_video sysctl set to 0, since rerunning the VGA POST > should be unnecessary. > > Ian > > Patch also at: http://people.freebsd.org/~iedowse/vesa_restore.diff > > Thank you here as well. This patch allows my Vaio TR3 to now resume correctly, modulo some fxp and mouse issues. 5.3-STABLE, hw.acpi.reset_video=0 DH
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