Re: [orca-list] Turning off screens with Orca

[Erik Heil <eheil sdf lonestar org>]

Hi,
I'm confused by you're comment here. When you use a hardware switch, their
is no drivers used in the process. i.e. What you are seentially doing is
just turning off a hrdware switch.  The same would be true if you had
turned off the wireless switch, or in you're case, perhaps pressed the
FN-F2 keys on certain Dell machines. All it does is disable the wireless
controller from a hrdware perspective versus programitically. That's why,
for instance, if you disable the wireless adapter with the key
combination, the driver does not load. Its not as if the interrupts are
actually trapped by the software. The FN key is not even exposed as part
of the keyboard layout. It is, for all intensive purposes, processed by
the system BIOS or EFI, if you're machine is capable of this.

On Tue, 10 Mar 2009, Krishnakant wrote:

> Date: Tue, 10 Mar 2009 23:58:29 +0530
> From: Krishnakant <hackingkk gmail com>
> To: Michael Whapples <mwhapples aim com>
> Cc: orca-list gnome org
> Subject: Re: [orca-list] Turning off screens with Orca
>
> hi,
> sudo vbetool dpms off works for me and orca has no problems.
>
> This had even solved a problem for my friend who had this similar
> problem with the switch which only worked in windows.
>
> happy hacking.
> Krishnakant.
>
> On Tue, 2009-03-10 at 18:20 +0000, Michael Whapples wrote:
> > Orca gets its information from the accessibility API (at-spi) rather
> > than relying on trying to gain information from the screen. You
> > shouldn't encounter problems with orca. However I have noticed that my
> > laptop has some bugs in the hardware which makes it undesireable to
> > turn off the screen (basically it doesn't always restore settings
> > correctly should I need to turn it on again whilst running, if you use
> > the switch on the lid to turn off the backlight (IE. shut the lid) it
> > can crash the system, etc). Windows drivers do have work arounds built
> > in so most users don't notice these problems, but for linux users
> > sometimes these problems cause alot of annoyance.
> >
> > BTW: When you say turning off the screen how do you mean turning off
> > the screen? I believe I may have followed what you meant because of
> > your comment that JFW doesn't like it (it sounds like you are
> > disabling the video hardware). The other way (which isn't fully
> > turning off the screen) is to just turn of the backlight in the LCD
> > panel (this takes out one power hungry component although more power
> > could be saved by disabling all the video hardware, not sure how
> > much). If it were possible to turn off the backlight only (not sure
> > how) nothing should complain about it as graphics is still being
> > produced, there's no light to see the images though. This may not be
> > explained best but I think the general idea is there.
> >
> > Michael Whapples
> > On 23/12/42 19:59, James & Nash wrote:
> > > Hi folks,
> > >
> > > As I have no need of a screen, if I turn off my laptop Screen in
> > > Ubuntu will Orca still work. i have no way of knowing if the screen
> > > is off but I am just curious to know how Orca reads the screen -
> > > does it read at system level? It doesn't seem to work with JFW
> > >
> > > Thanks
> > >
> > > james
> >
> > _______________________________________________
> > Orca-list mailing list
> > Orca-list gnome org
> > http://mail.gnome.org/mailman/listinfo/orca-list
> > Visit http://live.gnome.org/Orca for more information on Orca
>
> _______________________________________________
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> Visit http://live.gnome.org/Orca for more information on Orca

eheil sdf lonestar org
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