# Re: \[PATCH 4/6\] udlfb: Add module option to do without shadow framebuffer

- From: Florian Tobias Schandinat \<FlorianSchandinat@gmx.de\>
- Date: 2011-08-24 13:59:03 
- List: linux-fbdev
- Page: https://ratatoskr.run/linux-fbdev/2011/08/13461832
- Thread: https://ratatoskr.run/linux-fbdev/2011/08/13461831/t.md

```text
On 08/21/2011 08:34 PM, bernie@plugable.com wrote:
> From: Stuart Hopkins <redacted>
> 
> By default, udlfb allocates a 2nd buffer to shadow what's across
> the bus on the USB device.  It can operate without this shadow,
> but then it cannot tell which pixels have changed, and must send all.
> 
> Saves host memory, but worsens the USB 2.0 bus bottleneck.
> 
> This option allows users in very low memory situations (e.g.
> bifferboard) to optionally turn off this shadow framebuffer.
> 
> Signed-off-by: Bernie Thompson <bernie@plugable.com>
> Signed-off-by: Stuart Hopkins <redacted>

The order of the Signed-offs looks a bit strange here so I reordered them.

I applied the ?/6 series.


Thanks,

Florian Tobias Schandinat
```