[gta04] Meeting minutes for GTA04 discussion 20080411

Andy Green andy at openmoko.com
Fri Apr 18 10:16:46 CEST 2008

Hash: SHA1

Somebody in the thread at some point said:

|> if we leave this to x + usersapce, then x can turn on the bakclight
ONCe it has
|> filled the framebuffer. in fact x itself can just not turn it on, but
wait for
|> the "screensaver" app to turn it on after wakup from screenblank (ie
|> screensaver app will actually do the drawing and once it has drawn
the screen
|> it can turn backlight on. since x is pipelined and 1 clients
operations are
|> executed in sequence, the bl shouldnt go on until x has dumped all
the draw
|> requests to the screen).

OK.  But the framebuffer memory should still be as it was left at
suspend time, and the framebuffer driver itself could restore video
state on resume too (just dump and restore all the regs).

Well the display for the clock can be wrong or whatever but it will get
refreshed immediately and if the backlight is ramping up at that time,
maybe it feels very responsive to see video really quickly after you
wake it with touchscreen for example.

- -Andy
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