[Libdlo] GDM black screen / user and count meaning
bernie at plugable.com
Wed Dec 22 23:02:36 PST 2010
I took a first run at more complete DPMS/FB_BLANK support. Can you
grab the latest udlfb from git.plugable.com and verify if blanking
works as expected, and if it helps resolve the original problem you
The commit is http://git.plugable.com/gitphp/index.php?p=udlfb&a=commitdiff&h=6ea0f71cd642910ffcea5a98aeebf6f5d5470820
Thanks again for originally reporting this.
On Tue, Nov 9, 2010 at 2:11 PM, Bernie Thompson <bernie at plugable.com> wrote:
> Hi Alexander,
> On Mon, Nov 8, 2010 at 3:53 AM, Alexander Todorov <atodorov at otb.bg> wrote:
> > Further more in fb.h there are comments (around FB_BLANK_* definition)
> > pointing out that hsync and vsync can be on/off in various combinations. Why
> > doesn't dlfb_enable_hvsync() account for those as well?
> Thanks for pointing this out. The DL hardware doesn't map 1-1 with
> the FB_BLANK definitions, so right now it's been simplified: either be
> full on (FB_BLANK_UNBLANK) or full DPMS poweroff for any of the other
> But it is possible to add support for at least one more of the
> FB_BLANK states in-between.
> Looking at the debug output, I'm not sure if this will help the
> intermittant black screen problem, but actually there's a shot it will
> by avoiding timing troubles.
> So I'll look to implement this -- will reply back when that's done --
> so we can get a test to see.
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