Re: [Lcd4linux-devel] [lcd4linux] Layout transitions

[Scott F. <sc...@st...>]

> Ok, good point. I went the route you suggested by clearing the FB, and
> it brought up another intrusive point about the patch. It defaulted
> all layouts to a timeout. That causes the framebuffer to be cleared,
> interrupting the timing, and causing a noticeable change in the
> display. I defaulted the timeout to 0 (no timeout), but that can be
> overridden in the Display section.
>
> Display CF635 {
>    Icons 2
>    Driver 'Crystalfontz'
>    Model '635'
>    Port '/dev/ttyUSB1'
>    Speed 115200
>    Contrast 120
>    Backlight 100
>    DefaultTimeout 5000
> }
>
>>

I found that not all drivers use a text framebuffer. I made that
assumption and didn't check to see if the text framebuffer existed
before trying to clear it. It caused a crash of course. Attached is
the updated patch that checks like it should and it also clears any
graphic displays. I pulled a fresh copy off the SVN repo for it.