Difference between revisions of "RPiconfig"
Popcornmix (talk | contribs) m (→Video mode options) |
Popcornmix (talk | contribs) (→Video mode options) |
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sdtv_aspect=2 14:9 | sdtv_aspect=2 14:9 | ||
sdtv_aspect=3 16:9 | sdtv_aspect=3 16:9 | ||
+ | |||
+ | '''sdtv_disable_colourburst''' disabled colour burst on composite output. The picture will be monochrome, but possibly sharper | ||
+ | sdtv_disable_colourburst=1 colour burst is disabled | ||
'''hdmi_safe''' Use "safe mode" settings to try to boot with maximum hdmi compatibility. | '''hdmi_safe''' Use "safe mode" settings to try to boot with maximum hdmi compatibility. |
Revision as of 12:37, 11 July 2012
The Raspberry Pi config.txt file is read by the GPU before the ARM core is initialised. It can be used to set various system configuration parameters.
This file is an optional file on the boot partition. It would normally be accessible as /boot/config.txt from Linux.
To edit the configuration file, see the instructions at R-Pi_ConfigurationFile.
Contents
File format
The format is "property=value". value is an integer. You may specify only one option per line. Comments may be added by starting a line with the '#' character.
Here is an example file
# Set stdv mode to PAL (as used in Europe) sdtv_mode=2 # Force the monitor to HDMI mode so that sound will be sent over HDMI cable hdmi_drive=2 # Set monitor mode to DMT hdmi_group=2 # Set monitor resolution to 1024x768 XGA 60Hz (HDMI_DMT_XGA_60) hdmi_mode=16 # Make display smaller to stop text spilling off the screen overscan_left=20 overscan_right=12 overscan_top=10 overscan_bottom=10
Video mode configuration
Video mode options
sdtv_mode defines the TV standard for composite output (default=0)
sdtv_mode=0 Normal NTSC sdtv_mode=1 Japanese version of NTSC – no pedestal sdtv_mode=2 Normal PAL sdtv_mode=3 Brazilian version of PAL – 525/60 rather than 625/50, different subcarrier
sdtv_aspect defines the aspect ratio for composite output (default=1)
sdtv_aspect=1 4:3 sdtv_aspect=2 14:9 sdtv_aspect=3 16:9
sdtv_disable_colourburst disabled colour burst on composite output. The picture will be monochrome, but possibly sharper
sdtv_disable_colourburst=1 colour burst is disabled
hdmi_safe Use "safe mode" settings to try to boot with maximum hdmi compatibility.
hdmi_safe=1 (this does: hdmi_force_hotplug=1, config_hdmi_boost=4, hdmi_group=1, hdmi_mode=1, disable_overscan=0)
hdmi_ignore_edid Enables the ignoring of EDID/display data if your display is a crappy Chinese one
hdmi_ignore_edid=0xa5000080
hdmi_force_hotplug overrides the normal selection of composite if no HDMI is detected
hdmi_force_hotplug=1 Use HDMI mode even if no HDMI monitor is detected
hdmi_drive chooses between HDMI and DVI modes
hdmi_drive= 1 Normal DVI mode (No sound) hdmi_drive= 2 Normal HDMI mode (Sound will be sent if supported and enabled)
hdmi_group defines the HDMI type
Not specifying the group, or setting to 0 will use the preferred group reported by the edid.
hdmi_group=1 CEA hdmi_group=2 DMT
hdmi_mode defines screen resolution in CEA or DMT format
These values are valid if hdmi_group=1 (CEA) hdmi_mode=1 VGA hdmi_mode=2 480p 60Hz hdmi_mode=3 480p 60Hz H hdmi_mode=4 720p 60Hz hdmi_mode=5 1080i 60Hz hdmi_mode=6 480i 60Hz hdmi_mode=7 480i 60Hz H hdmi_mode=8 240p 60Hz hdmi_mode=9 240p 60Hz H hdmi_mode=10 480i 60Hz 4x hdmi_mode=11 480i 60Hz 4x H hdmi_mode=12 240p 60Hz 4x hdmi_mode=13 240p 60Hz 4x H hdmi_mode=14 480p 60Hz 2x hdmi_mode=15 480p 60Hz 2x H hdmi_mode=16 1080p 60Hz hdmi_mode=17 576p 50Hz hdmi_mode=18 576p 50Hz H hdmi_mode=19 720p 50Hz hdmi_mode=20 1080i 50Hz hdmi_mode=21 576i 50Hz hdmi_mode=22 576i 50Hz H hdmi_mode=23 288p 50Hz hdmi_mode=24 288p 50Hz H hdmi_mode=25 576i 50Hz 4x hdmi_mode=26 576i 50Hz 4x H hdmi_mode=27 288p 50Hz 4x hdmi_mode=28 288p 50Hz 4x H hdmi_mode=29 576p 50Hz 2x hdmi_mode=30 576p 50Hz 2x H hdmi_mode=31 1080p 50Hz hdmi_mode=32 1080p 24Hz hdmi_mode=33 1080p 25Hz hdmi_mode=34 1080p 30Hz hdmi_mode=35 480p 60Hz 4x hdmi_mode=36 480p 60Hz 4xH hdmi_mode=37 576p 50Hz 4x hdmi_mode=38 576p 50Hz 4x H hdmi_mode=39 1080i 50Hz reduced blanking hdmi_mode=40 1080i 100Hz hdmi_mode=41 720p 100Hz hdmi_mode=42 576p 100Hz hdmi_mode=43 576p 100Hz H hdmi_mode=44 576i 100Hz hdmi_mode=45 576i 100Hz H hdmi_mode=46 1080i 120Hz hdmi_mode=47 720p 120Hz hdmi_mode=48 480p 120Hz hdmi_mode=49 480p 120Hz H hdmi_mode=50 480i 120Hz hdmi_mode=51 480i 120Hz H hdmi_mode=52 576p 200Hz hdmi_mode=53 576p 200Hz H hdmi_mode=54 576i 200Hz hdmi_mode=55 576i 200Hz H hdmi_mode=56 480p 240Hz hdmi_mode=57 480p 240Hz H hdmi_mode=58 480i 240Hz hdmi_mode=59 480i 240Hz H H means 16:9 variant (of a normally 4:3 mode). 2x means pixel doubled (i.e. higher clock rate, with each pixel repeated twice) 4x means pixel quadrupled (i.e. higher clock rate, with each pixel repeated four times)
These values are valid if hdmi_group=2 (DMT) hdmi_mode=1 640x350 85Hz hdmi_mode=2 640x400 85Hz hdmi_mode=3 720x400 85Hz hdmi_mode=4 640x480 60Hz hdmi_mode=5 640x480 72Hz hdmi_mode=6 640x480 75Hz hdmi_mode=7 640x480 85Hz hdmi_mode=8 800x600 56Hz hdmi_mode=9 800x600 60Hz hdmi_mode=10 800x600 72Hz hdmi_mode=11 800x600 75Hz hdmi_mode=12 800x600 85Hz hdmi_mode=13 800x600 120Hz hdmi_mode=14 848x480 60Hz hdmi_mode=15 1024x768 43Hz DO NOT USE hdmi_mode=16 1024x768 60Hz hdmi_mode=17 1024x768 70Hz hdmi_mode=18 1024x768 75Hz hdmi_mode=19 1024x768 85Hz hdmi_mode=20 1024x768 120Hz hdmi_mode=21 1152x864 75Hz hdmi_mode=22 1280x768 reduced blanking hdmi_mode=23 1280x768 60Hz hdmi_mode=24 1280x768 75Hz hdmi_mode=25 1280x768 85Hz hdmi_mode=26 1280x768 120Hz reduced blanking hdmi_mode=27 1280x800 reduced blanking hdmi_mode=28 1280x800 60Hz hdmi_mode=29 1280x800 75Hz hdmi_mode=30 1280x800 85Hz hdmi_mode=31 1280x800 120Hz reduced blanking hdmi_mode=32 1280x960 60Hz hdmi_mode=33 1280x960 85Hz hdmi_mode=34 1280x960 120Hz reduced blanking hdmi_mode=35 1280x1024 60Hz hdmi_mode=36 1280x1024 75Hz hdmi_mode=37 1280x1024 85Hz hdmi_mode=38 1280x1024 120Hz reduced blanking hdmi_mode=39 1360x768 60Hz hdmi_mode=40 1360x768 120Hz reduced blanking hdmi_mode=41 1400x1050 reduced blanking hdmi_mode=42 1400x1050 60Hz hdmi_mode=43 1400x1050 75Hz hdmi_mode=44 1400x1050 85Hz hdmi_mode=45 1400x1050 120Hz reduced blanking hdmi_mode=46 1440x900 reduced blanking hdmi_mode=47 1440x900 60Hz hdmi_mode=48 1440x900 75Hz hdmi_mode=49 1440x900 85Hz hdmi_mode=50 1440x900 120Hz reduced blanking hdmi_mode=51 1600x1200 60Hz hdmi_mode=52 1600x1200 65Hz hdmi_mode=53 1600x1200 70Hz hdmi_mode=54 1600x1200 75Hz hdmi_mode=55 1600x1200 85Hz hdmi_mode=56 1600x1200 120Hz reduced blanking hdmi_mode=57 1680x1050 reduced blanking hdmi_mode=58 1680x1050 60Hz hdmi_mode=59 1680x1050 75Hz hdmi_mode=60 1680x1050 85Hz hdmi_mode=61 1680x1050 120Hz reduced blanking hdmi_mode=62 1792x1344 60Hz hdmi_mode=63 1792x1344 75Hz hdmi_mode=64 1792x1344 120Hz reduced blanking hdmi_mode=65 1856x1392 60Hz hdmi_mode=66 1856x1392 75Hz hdmi_mode=67 1856x1392 120Hz reduced blanking hdmi_mode=68 1920x1200 reduced blanking hdmi_mode=69 1920x1200 60Hz hdmi_mode=70 1920x1200 75Hz hdmi_mode=71 1920x1200 85Hz hdmi_mode=72 1920x1200 120Hz reduced blanking hdmi_mode=73 1920x1440 60Hz hdmi_mode=74 1920x1440 75Hz hdmi_mode=75 1920x1440 120Hz reduced blanking hdmi_mode=76 2560x1600 reduced blanking hdmi_mode=77 2560x1600 60Hz hdmi_mode=78 2560x1600 75Hz hdmi_mode=79 2560x1600 85Hz hdmi_mode=80 2560x1600 120Hz reduced blanking hdmi_mode=81 1366x768 60Hz hdmi_mode=82 1080p 60Hz hdmi_mode=83 1600x900 reduced blanking hdmi_mode=84 2048x1152 reduced blanking hdmi_mode=85 720p 60Hz hdmi_mode=86 1366x768 reduced blanking
overscan_left number of pixels to skip on left
overscan_right number of pixels to skip on right
overscan_top number of pixels to skip on top
overscan_bottom number of pixels to skip on bottom
framebuffer_width console framebuffer width in pixels. Default is display width minus overscan.
framebuffer_height console framebuffer height in pixels. Default is display height minus overscan.
framebuffer_depth console framebuffer depth in bits per pixel. Default is 16. 8bit is valid, but default RGB palette makes an unreadable screen. 24bit looks better but has corruption issues as of 20120615. 32bit has no corruption issues but needs framebuffer_ignore_alpha=1 and shows the wrong colors as of 20120615.
framebuffer_ignore_alpha set to 1 to disable alpha channel. Helps with 32bit.
test_mode enable test sound/image during boot for manufacturing test.
disable_l2cache disable arm access to GPU's L2 cache. Needs corresponding L2 disabled kernel. Default is 0.
disable_overscan set to 1 to disable overscan.
config_hdmi_boost configure the signal strength of the HDMI interface. Default is 0. Try 4 if you have interference issues with hdmi. 7 is the maximum.
Which values are valid for my monitor?
Your HDMI monitor may support only a limited set of formats. To find out which formats are supported, use the following method.
- Set the output format to VGA 60Hz (hdmi_group=1 hdmi_mode=1) and boot up the Raspberry Pi
- Enter the following command to give a list of CEA supported modes
/opt/vc/bin/tvservice -m CEA
- Enter the following command to give a list of DMT supported modes
/opt/vc/bin/tvservice -m DMT
- Enter the following command to show your current state
/opt/vc/bin/tvservice -s
- Enter the following commands to dump more detailed information from your monitor
/opt/vc/bin/tvservice -d edid.dat /opt/vc/bin/edidparser edid.dat
The edid.dat should also be provided when troubleshooting problems with the default HDMI mode
Boot options
disable_commandline_tags Stops start.elf from filling in ATAGS (memory from 0x100) before launching kernel
cmdline (string) Command line parameters. Can be used instead of cmdline.txt file
kernel (string) Alternative name to use when loading kernel.
kernel_address address to load kernel.img file at
ramfsfile (string) ramfs file to load
device_tree_address address to load device_tree at
init_uart_baud initial uart baud rate. Default 115200
init_uart_clock initial uart clock. Default 3000000
init_emmc_clock initial emmc clock. Default 50000000 (50mhz default. increasing this can speedup your SD-card)
boot_delay Waits for given number of seconds in start.elf before loading kernel.img.
Overclocking configuration
WARNING: Setting any of the parameters which over volt your Raspberry Pi will set a permanent bit within the SOC and your warranty is void. So If you care about the warranty do not adjust voltage.
Also at your own risk you can try overscan settings from our wiki. These were posted on the forum and are not confimed to work.
Overclocking options
Option | Description |
---|---|
arm_freq | frequency of ARM in MHz. Default 700. |
gpu_freq | Sets core_freq, h264_freq, isp_freq, v3d_freq together. |
core_freq | frequency of GPU processor core in MHz. Default 250. |
h264_freq | frequency of hardware video block in MHz. Default 250. |
isp_freq | frequency of image sensor pipeline block in MHz. Default 250. |
v3d_freq | frequency of 3D block in MHz. Default 250. |
sdram_freq | frequency of SDRAM in MHz. Default 400. |
over_voltage | ARM/GPU core voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V) [1] |
over_voltage_sdram | Sets over_voltage_sdram_c, over_voltage_sdram_i, over_voltage_sdram_p together |
over_voltage_sdram_c | SDRAM controller voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V) [1] |
over_voltage_sdram_i | SDRAM I/O voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[1] |
over_voltage_sdram_p | SDRAM phy voltage adjust. [-16,8] equates to [0.8V,1.4V] with 0.025V steps. Default 0 (1.2V)[1] |
Tested values
The following table shows some successfull attempts of overclocking. These settings may not work on every device and can shorten the life of the Broadcom SoC. Warranty will be voided if overvoltage is used.
arm_freq | gpu_freq | core_freq | h264_freq | isp_freq | v3d_freq | sdram_freq | over_voltage | over_voltage_sdram |
---|---|---|---|---|---|---|---|---|
900 | 250 | 500 | ||||||
900 | 350 | |||||||
930 | 350 | 500 | ||||||
1000 | 500 | 500 | 6 |
Notes
<references>
- ↑ 1.0 1.1 1.2 1.3 What this means is that you can specify -16 and expect about 0.8V as the GPU/core voltage. This is 0.4V below the normal value of 1.2. If you specify 16, you'd get 0.4V ABOVE the normal value of 1.2V, or 1.6V. The fact that someone carefully specified "8" and "1.4V" as the upper limit in the examples leads me to think that it is likely to shorten the life of your raspberry pi significantly if you would specify values above "8". So: don't specify values above zero, but if you do, don't go above 8.