[SeaBIOS] running vga bios on resume from S3

Gleb Natapov gleb at redhat.com
Thu Feb 25 07:36:11 CET 2010

On Wed, Feb 24, 2010 at 11:34:17PM -0500, Kevin O'Connor wrote:
> On Wed, Feb 24, 2010 at 11:59:26AM +0200, Gleb Natapov wrote:
> > Shouldn't we make CONFIG_S3_RESUME_VGA_INIT=1 by default. Otherwise
> > console doesn't work on Linux after resume.
> As far as I can tell, a real BIOS does not call the video bios on
> resume.  As such, enabling that define seems to be working around a
> problem in either the video system or Linux.  I fear it will cause
> problems in more advanced situations (like device passthrough in
> KVM).
> As such, I don't think it should be enabled by default.
Googling "Run VGA Bios if S3 Resume" suggest that there are real BIOSes that
run video bios on resume. I don't see how resume can work otherwise for
non-GUI setups.


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