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--- doc:appunti:hardware:raspberrypi_3 [2024/03/21 23:37] – niccolo
+++ doc:appunti:hardware:raspberrypi_3 [2024/03/22 07:12] – niccolo
@@ Line 1: / Line 1: @@
 ====== Kodi on the Raspberry Pi 3 and CMA problems ======
-Running **Kodi 19.4** on the **Raspberry Pi 3 Model B Plus Rev 1.3** with **Raspberry Pi OS** based on Debian 11.9, I experienced some weird crashes of the Kodi interface: sometimes the Kodi process suddendly restart while I'm browsing a folder with about 200 video items.
+I installed **Kodi 19.4** on the **Raspberry Pi 3 Model B Plus Rev 1.3**, running the **Raspberry Pi OS** based on **Debian 11.9**. Unfortunately I experienced some weird crashes of the Kodi program: sometimes the Kodi process suddendly restart while I'm browsing a folder with about 200 video items.
 The error messages are revealed by the **dmesg** output:
@@ Line 23: / Line 23: @@
 </code>
-In **/boot/config.txt** you should confirm that you are loading the **vc4-kms-v3d** overlay, which will use the **VideoCore IV GPU** available on the Raspberry Pi 3.
+In **/boot/config.txt** you should confirm that you are loading the **vc4-kms-v3d** overlay, which is the module dedicated to GPU management, the **VideoCore IV GPU** available on the Raspberry Pi 3:
 <code>
@@ Line 34: / Line 34: @@
 <file>
-# Default cma reserved memory is 256 Mb, use 480 instead.
+# Default cma reserved memory is 256 Mb, use 512 instead.
-dtoverlay=cma,cma-size=503316480
+dtoverlay=cma,cma-size=536870912
 </file>
@@ Line 41: / Line 41: @@
 <file>
-gpu_mem=128
+gpu_mem=92
 </file>
@@ Line 50: / Line 50: @@
 <code>
 ./bcmstat.sh Dd5
 </code>
@@ Line 56: / Line 55: @@
 <code>
-[    0.000000] Reserved memory: created CMA memory pool at 0x10c00000, size 480 MiB
+[    0.000000] Reserved memory: created CMA memory pool at 0x0ec00000, size 512 MiB
-[    0.000000] Memory: 398320K/917504K available (10240K kernel code, 1452K rwdata,
+[    0.000000] Memory: 402028K/954368K available (10240K kernel code, 1452K rwdata,
-K rodata, 1024K init, 613K bss, 27664K reserved, 491520K cma-reserved)
+K rodata, 1024K init, 613K bss, 28052K reserved, 524288K cma-reserved)
 </code>
@@ Line 65: / Line 64: @@
 <code>
                total        used        free      shared  buff/cache   available
-Mem:          890864      286280      287876        2836      316708      546816
+Mem:          927340      321760      319708        2836      285872      548032
 Swap:         524284           0      524284
 </code>
-About **280 Mb of free memory** should suffice for normal operations.
+About **300 Mb of free memory** should suffice for normal operations.