Suspend and resume on Dell E6520
John Baldwin
jhb at freebsd.org
Tue Nov 29 14:07:33 UTC 2011
On Monday, November 28, 2011 12:15:25 pm Jung-uk Kim wrote:
> On Thursday 24 November 2011 01:33 am, Sebastian Chmielewski wrote:
> > On Wed, 23 Nov 2011 20:50:58 -0500
> >
> > Jung-uk Kim <jkim at FreeBSD.org> wrote:
> > > Usually, we cannot resume console on NVIDIA graphics, which often
> > > times lack or has incomplete VBE save/restore state function.
> >
> > I had kldunload nvidia in rc.suspend. Isn't that enough?
>
> No, it doesn't (can't) save/restore GPU state. In fact, nvidia.ko may
> help when you are suspending from X11. At least in theory, it should
> be able to save/restore GPU state correctly. However, a NVIDIA
> engineer once told me that the code path wasn't tested well because
> he couldn't find a right laptop to test at the time. It was long
> ago, though.
Yes, the nvidia folks would probably work on fixing suspend and resume of
nvidia GPUs if we could point them at a laptop for which suspend and resume
otherwise worked.
--
John Baldwin
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