Mark Knecht wrote: >Hi, > What are they? What do they help? How much? > > How is this related to the USE flag directfb? > > I'm building a machine that isintended to record a lot of video >using MythTV. The video probably won't be viewed directly on this >machine but if it is I'd like the performance to be good. > > Is this somthing that would help significantly? > >
Probably not. Generally, framebuffers are used for graphics consoles...console in the sense of those first 6 ttys that normally do nothing but display "login:". Packages like bootsplash depend on framebuffer graphics, and some GUI applications can also use framebuffers directly, instead of X, which is mostly useful on embedded or kiosk systems where memory can be very tight, and X can be overkill. Some X drivers can use a merged framebuffer with the kernel, which I _think_ saves you a bit of memory and not much else. At least, I get no noticable performance difference with the 'radeon' driver whether I set the UseFBDev option or not. The only benefit to UseFBDev I have found is that it stops VMWare from complaining when I try to make a low-resolution virtual machine appear full screen. For video playback, I think your best bet is to just stay in X. -Richard -- gentoo-user@gentoo.org mailing list
