1*ab42b818SMauro Carvalho Chehab============= 2*ab42b818SMauro Carvalho ChehabWhat is gxfb? 3*ab42b818SMauro Carvalho Chehab============= 4*ab42b818SMauro Carvalho Chehab 5*ab42b818SMauro Carvalho Chehab.. [This file is cloned from VesaFB/aty128fb] 6*ab42b818SMauro Carvalho Chehab 7*ab42b818SMauro Carvalho ChehabThis is a graphics framebuffer driver for AMD Geode GX2 based processors. 8*ab42b818SMauro Carvalho Chehab 9*ab42b818SMauro Carvalho ChehabAdvantages: 10*ab42b818SMauro Carvalho Chehab 11*ab42b818SMauro Carvalho Chehab * No need to use AMD's VSA code (or other VESA emulation layer) in the 12*ab42b818SMauro Carvalho Chehab BIOS. 13*ab42b818SMauro Carvalho Chehab * It provides a nice large console (128 cols + 48 lines with 1024x768) 14*ab42b818SMauro Carvalho Chehab without using tiny, unreadable fonts. 15*ab42b818SMauro Carvalho Chehab * You can run XF68_FBDev on top of /dev/fb0 16*ab42b818SMauro Carvalho Chehab * Most important: boot logo :-) 17*ab42b818SMauro Carvalho Chehab 18*ab42b818SMauro Carvalho ChehabDisadvantages: 19*ab42b818SMauro Carvalho Chehab 20*ab42b818SMauro Carvalho Chehab * graphic mode is slower than text mode... 21*ab42b818SMauro Carvalho Chehab 22*ab42b818SMauro Carvalho Chehab 23*ab42b818SMauro Carvalho ChehabHow to use it? 24*ab42b818SMauro Carvalho Chehab============== 25*ab42b818SMauro Carvalho Chehab 26*ab42b818SMauro Carvalho ChehabSwitching modes is done using gxfb.mode_option=<resolution>... boot 27*ab42b818SMauro Carvalho Chehabparameter or using `fbset` program. 28*ab42b818SMauro Carvalho Chehab 29*ab42b818SMauro Carvalho ChehabSee Documentation/fb/modedb.rst for more information on modedb 30*ab42b818SMauro Carvalho Chehabresolutions. 31*ab42b818SMauro Carvalho Chehab 32*ab42b818SMauro Carvalho Chehab 33*ab42b818SMauro Carvalho ChehabX11 34*ab42b818SMauro Carvalho Chehab=== 35*ab42b818SMauro Carvalho Chehab 36*ab42b818SMauro Carvalho ChehabXF68_FBDev should generally work fine, but it is non-accelerated. 37*ab42b818SMauro Carvalho Chehab 38*ab42b818SMauro Carvalho Chehab 39*ab42b818SMauro Carvalho ChehabConfiguration 40*ab42b818SMauro Carvalho Chehab============= 41*ab42b818SMauro Carvalho Chehab 42*ab42b818SMauro Carvalho ChehabYou can pass kernel command line options to gxfb with gxfb.<option>. 43*ab42b818SMauro Carvalho ChehabFor example, gxfb.mode_option=800x600@75. 44*ab42b818SMauro Carvalho ChehabAccepted options: 45*ab42b818SMauro Carvalho Chehab 46*ab42b818SMauro Carvalho Chehab================ ================================================== 47*ab42b818SMauro Carvalho Chehabmode_option specify the video mode. Of the form 48*ab42b818SMauro Carvalho Chehab <x>x<y>[-<bpp>][@<refresh>] 49*ab42b818SMauro Carvalho Chehabvram size of video ram (normally auto-detected) 50*ab42b818SMauro Carvalho Chehabvt_switch enable vt switching during suspend/resume. The vt 51*ab42b818SMauro Carvalho Chehab switch is slow, but harmless. 52*ab42b818SMauro Carvalho Chehab================ ================================================== 53*ab42b818SMauro Carvalho Chehab 54*ab42b818SMauro Carvalho ChehabAndres Salomon <dilinger@debian.org> 55