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boabawhales

Member

From: New York, NY

Registered: 2010-06-25

Posts: 2

TrueColor Frambuffer on a IBM ThinkPad X23 w/ AIT Mobility M6 LY

I am building a framebuffer-only system that supports video playback on my 8-year-old IBM ThinkPad X23.

For video playback, I would need my framebuffer to have color depth of at least 16 bit. (I think)

But I am running out of ideas as to how to do that.

So far I am able to achieve this:

- my logs indicate that:

/* /var/log/everything.log */
...
vesafb: mode is 1024x768x32, linelength=4069, pages=1
...

so i think i am able to get 32 bit color depth.

- but later on in the log:

/* /var/log/everything.log */
...
[drm] Panel Size 1024x768
...
[drm] fb depth is 8
...

this got me quite confused.

- after it boots, if i execute "fbset -i" as root, i get:

mode "1024x768"
    geometry 1024 768 1024 768 8
    ...
endmode

Frame buffer device information:
    Name: radeondrmfb
    ...
    Type: PACKED PIXELS
    Visual: PSEUDOCOLOR
    ...
    Accelerator: No

- lastly, if i execute "vbetest" i do get the option of:

[291] 1024x768 (8:8:8)

which I understand means 24/32 bit color depth.

I am guessing the "pseudocolor" means that my framebuffer cannot go higher than 8 bit color depth. But I am totally a newb in this area so correct me if I'm wrong.

Please let me know if you need any other logs/information

Thank you so much in advance.

Edit: one more thing to add. when I use vbetest to test the mode above (1024x768 (8:8:8)), the screen seems to be displaying the full color spectrum...

Last edited by boabawhales (2010-06-25 13:42:27)

boabawhales

Member

From: New York, NY

Registered: 2010-06-25

Posts: 2

Re: TrueColor Frambuffer on a IBM ThinkPad X23 w/ AIT Mobility M6 LY

I would like to bump this post just this one time.

If someone has experience with FrameBuffers please help me out.

Thank you.