diff options
Diffstat (limited to 'Documentation/fb/udlfb.txt')
| -rw-r--r-- | Documentation/fb/udlfb.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/fb/udlfb.txt b/Documentation/fb/udlfb.txt index 7fdde2a02a27..473ceed9e4eb 100644 --- a/Documentation/fb/udlfb.txt +++ b/Documentation/fb/udlfb.txt @@ -105,6 +105,11 @@ console Allow fbcon to attach to udlfb provided framebuffers. This the first framebuffer it finds, which isn't usually what the user wants in the case of USB displays. +shadow Allocate a 2nd framebuffer to shadow what's currently across + the USB bus in device memory. If any pixels are unchanged, + do not transmit. Spends host memory to save USB transfers. + Enabled by default. Only disable on very low memory systems. + Sysfs Attributes ================ |