^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) =============================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) Intel 830M/845G/852GM/855GM/865G/915G/945G Framebuffer driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) =============================================================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) A. Introduction
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) ===============
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) This is a framebuffer driver for various Intel 8xx/9xx compatible
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) graphics devices. These would include:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) - Intel 830M
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) - Intel 845G
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) - Intel 852GM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) - Intel 855GM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) - Intel 865G
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) - Intel 915G
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) - Intel 915GM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) - Intel 945G
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) - Intel 945GM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) - Intel 945GME
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) - Intel 965G
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) - Intel 965GM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) B. List of available options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) =============================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) a. "video=intelfb"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) enables the intelfb driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) Recommendation: required
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) b. "mode=<xres>x<yres>[-<bpp>][@<refresh>]"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) select mode
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) Recommendation: user preference
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) (default = 1024x768-32@70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) c. "vram=<value>"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) select amount of system RAM in MB to allocate for the video memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) if not enough RAM was already allocated by the BIOS.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) Recommendation: 1 - 4 MB.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) (default = 4 MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) d. "voffset=<value>"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) select at what offset in MB of the logical memory to allocate the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) framebuffer memory. The intent is to avoid the memory blocks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) used by standard graphics applications (XFree86). Depending on your
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) usage, adjust the value up or down, (0 for maximum usage, 63/127 MB
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) for the least amount). Note, an arbitrary setting may conflict
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) with XFree86.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) Recommendation: do not set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) (default = 48 MB)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) e. "accel"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) enable text acceleration. This can be enabled/reenabled anytime
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) by using 'fbset -accel true/false'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) Recommendation: enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) (default = set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) f. "hwcursor"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) enable cursor acceleration.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) Recommendation: enable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) (default = set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) g. "mtrr"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) enable MTRR. This allows data transfers to the framebuffer memory
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) to occur in bursts which can significantly increase performance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) Not very helpful with the intel chips because of 'shared memory'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) Recommendation: set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) (default = set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) h. "fixed"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) disable mode switching.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) Recommendation: do not set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) (default = not set)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) The binary parameters can be unset with a "no" prefix, example "noaccel".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) The default parameter (not named) is the mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) C. Kernel booting
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) =================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) Separate each option/option-pair by commas (,) and the option from its value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) with an equals sign (=) as in the following::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) video=intelfb:option1,option2=value2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) Sample Usage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) ------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) In /etc/lilo.conf, add the line::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) append="video=intelfb:mode=800x600-32@75,accel,hwcursor,vram=8"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) This will initialize the framebuffer to 800x600 at 32bpp and 75Hz. The
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) framebuffer will use 8 MB of System RAM. hw acceleration of text and cursor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) will be enabled.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) Remarks
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) -------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) If setting this parameter doesn't work (you stay in a 80x25 text-mode),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) you might need to set the "vga=<mode>" parameter too - see vesafb.txt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) in this directory.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) D. Module options
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) ==================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) The module parameters are essentially similar to the kernel
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) parameters. The main difference is that you need to include a Boolean value
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) (1 for TRUE, and 0 for FALSE) for those options which don't need a value.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) Example, to enable MTRR, include "mtrr=1".
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) Sample Usage
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) ------------
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) Using the same setup as described above, load the module like this::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) modprobe intelfb mode=800x600-32@75 vram=8 accel=1 hwcursor=1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) Or just add the following to a configuration file in /etc/modprobe.d/::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) options intelfb mode=800x600-32@75 vram=8 accel=1 hwcursor=1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) and just do a::
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) modprobe intelfb
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) E. Acknowledgment:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ===================
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 1. Geert Uytterhoeven - his excellent howto and the virtual
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) framebuffer driver code made this possible.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 2. Jeff Hartmann for his agpgart code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 3. David Dawes for his original kernel 2.4 code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 4. The X developers. Insights were provided just by reading the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) XFree86 source code.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 5. Antonino A. Daplas for his inspiring i810fb driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 6. Andrew Morton for his kernel patches maintenance.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) Sylvain
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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