#1386 LOW Update.: Hardware cursor support for LX
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Thu Dec 27 16:30:06 EST 2007
#1386: Hardware cursor support for LX
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Reporter: jg | Owner: lincolnquirk
Type: enhancement | Status: new
Priority: low | Milestone: Update.2
Component: x window system | Version:
Resolution: | Keywords:
Verified: 0 | Blocking:
Blockedby: |
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Changes (by Bart Massey):
* priority: normal => low
Comment:
Replying to [comment:5 lincolnquirk]:
>I have a program that uses GTK to set the cursor, but I know no way to
determine whether the cursor is in hardware or not.
You might just hack the driver to put a red rectangle around the hardware
cursor temporarily.
That said, I had a talk with Keithp a bit ago about hardware cursor and
power. It seems like power would be the main reason to turn on the
hardware cursor---the software cursor seems fine otherwise. But Keithp
points out that when the hardware cursor is enabled the overlay hardware
is powered even when the cursor is standing still. There's thus a tradeoff
between power consumed to re-render the cursor in software when it moves
or its background changes, and power consumed to leave the cursor sitting
on the screen when nothing's happening to it. Keithp's offhand guess was
that the hardware cursor would be a net power loss. We should probably
make some power measurements before bothering with this---I'm taking the
liberty of dropping it to low priority for now.
--
Ticket URL: <http://dev.laptop.org/ticket/1386#comment:6>
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