[2024-feb-29] Sad news: Eric Layton aka Nocturnal Slacker aka vtel57 passed away on Feb 26th, shortly after hospitalization. He was one of our Wiki's most prominent admins. He will be missed.

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howtos:hardware:arm:raspberrypi3 [2017/06/08 05:02 (UTC)] – [Manual install method without a Raspbian image] yugiohjcjhowtos:hardware:arm:raspberrypi3 [2017/06/14 15:47 (UTC)] – [Manual install method without a Raspbian image] replace "are" by "is" yugiohjcj
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 ==== Manual install method without a Raspbian image ==== ==== Manual install method without a Raspbian image ====
  
-Table of contents +This method is for installing Slackware ARM 14.2 on a Raspberry Pi 3 Model B without a Raspbian image. 
-  - Partition and format the SD Card +However, it should work for other Slackware ARM and Raspberry Pi versions.
-  - Put the Raspberry Pi firmware in the SD Card +
-  - Put the Slackware ARM mini root file system in the SD Card +
-  - Insert the SD Card in the Raspberry Pi +
- +
-Remarks: +
-  * This method is for installing Slackware ARM 14.2 on a Raspberry Pi 3 Model B without a Raspbian image +
-  * However, it should work for other Slackware ARM and Raspberry Pi versions+
  
 === 1. Partition and format the SD Card === === 1. Partition and format the SD Card ===
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   * I recommend to disallow the "root" user to connect through SSH   * I recommend to disallow the "root" user to connect through SSH
   * I recommend to [[https://www.raspberrypi.org/documentation/linux/kernel/building.md|build your own Linux kernel]] packages because the kernel you are running does not match with the installed Slackware ARM packages   * I recommend to [[https://www.raspberrypi.org/documentation/linux/kernel/building.md|build your own Linux kernel]] packages because the kernel you are running does not match with the installed Slackware ARM packages
-  * I recommend to [[https://dri.freedesktop.org/wiki/VC4/|build your own Mesa]] package to get 60 FPS with the "glxgears" command ([[https://github.com/anholt/mesa/issues/73|here]] is how I did)+ 
 +=== 5. Tips and tricks === 
 + 
 +== 5.1. Processor == 
 + 
 +The Raspberry Pi processor can reach 1.2GHz. 
 +However, by default, it is stuck to 600MHz even if it is used at 100%. 
 +You can check the current frequency of the processor by typing: 
 +<code>$ cpufreq-info</code> 
 + 
 +In order to reach 1.2GHz when the processor is used at 100% (i.e., use the frequency scaling), you need to change the default governors. 
 +Add the following line to the end of the ''/etc/rc.d/rc.local'' file: 
 +<code>echo ondemand | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor</code> 
 +Now, the processor is correctly set. 
 + 
 +== 5.2. Time == 
 + 
 +Unfortunately, the Raspberry Pi does not provide a Real-Time Clock (RTC). 
 +That is why there is no battery included with the board. 
 +It means that each time you shutdown the Raspberry Pi, the time is reset! 
 +However, if you have internet access, you can update the time during the Slackware ARM boot. 
 +Add the following line to the end of the ''/etc/rc.d/rc.local'' file: 
 +<code>ntpdate pool.ntp.org</code> 
 +Now, the time is correctly set. 
 + 
 +== 5.3. Video == 
 + 
 +Unfortunately, the Raspberry Pi is not compatible with OpenGL (it is compatible OpenGL ES that is a subset of OpenGL). 
 +It means that, by default, each application requiring OpenGL will be slow. 
 +However, you can reach 60 FPS with OpenGL applications on the Raspberry Pi by using the correct driver. 
 + 
 +Firstly, you need to build Mesa (>= 17.0.4) with the VC4 DRI driver: 
 +<code> 
 +$ CFLAGS="-O2 -march=armv8-a -mtune=cortex-a53 -mfloat-abi=softfp -mfpu=neon-vfpv4" \ 
 + CXXFLAGS="-O2 -march=armv8-a -mtune=cortex-a53 -mfloat-abi=softfp -mfpu=neon-vfpv4" \ 
 + ./configure \ 
 + --prefix=/usr \ 
 + --sysconfdir=/etc \ 
 + --with-dri-driverdir=/usr/lib/xorg/modules/dri \ 
 + --with-egl-platforms=x11,drm \ 
 + --with-gallium-drivers=vc4 
 +$ make -j4 
 +$ make install DESTDIR=/where/you/want/to/install 
 +</code> 
 +Then build your own Slackware ARM Mesa package and install it. 
 + 
 +Secondly, add the following line to the end of the ''/boot/config.txt'' file: 
 +<code>dtoverlay=vc4-fkms-v3d</code> 
 +Then reboot the Raspberry Pi. 
 + 
 +You can check that you are able to get 60 FPS with OpenGL applications on the Raspberry Pi by typing the following command in an X terminal: 
 +<code>$ glxgears</code> 
 + 
 +Now, the video is correctly set.
 ===== Sources ===== ===== Sources =====
  

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