Raspberry Pi - Revision history

Kenneth: /* Model A vs B */

2025-12-03T06:30:02Z

Model A vs B

← Older revision		Revision as of 06:30, 3 December 2025
Line 86:		Line 86:

	== Model A vs B ==		== Model A vs B ==

			'''Model B''' indicates the presence of an Ethernet port. '''Model A''' indicates a lower-cost model in a smaller form factor with no Ethernet port, reduced RAM, and fewer USB ports to limit board height.

			Raspberry Pi product series explained - Raspberry Pi
			https://www.raspberrypi.com/news/raspberry-pi-product-series-explained/

	Model B includes additionally the following:		Model B includes additionally the following:

Kenneth: /* Upgrade Bullseye to Bookworm */

2025-04-24T18:26:35Z

Upgrade Bullseye to Bookworm

← Older revision		Revision as of 18:26, 24 April 2025
Line 3,540:		Line 3,540:
	# look for any missed references		# look for any missed references
	grep -lnr bullseye /etc/apt		grep -lnr bullseye /etc/apt

			cd /etc/apt/sources.list.d/
			for i in *.list ; do sed -i 's/bullseye/bookworm/g' $i ; done

	apt-get update		apt-get update

Kenneth: /* Upgrade Jessie to Stretch */

2025-04-24T17:39:39Z

Upgrade Jessie to Stretch

@@ Line 3,518: / Line 3,518: @@
 * remove /etc/profile.d/wifi-country.sh
 == Upgrade Jessie to Stretch ==
@@ Line 3,524: / Line 3,567: @@
   apt-get upgrade
   apt-get dist-upgrade
   dpkg -C

Kenneth: /* Turbo Mode */

2024-10-31T09:10:20Z

Turbo Mode

← Older revision		Revision as of 09:10, 31 October 2024
Line 3,761:		Line 3,761:

	Forces turbo mode frequencies even when the ARM cores are not busy. Enabling this may set the warranty bit if over_voltage_* is also set.		Forces turbo mode frequencies even when the ARM cores are not busy. Enabling this may set the warranty bit if over_voltage_* is also set.

			=== Power Save Mode ===


			echo powersave \| sudo tee /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
			and the higher one with "performance" instead of "powersave"

			<ref>https://forums.raspberrypi.com/viewtopic.php?t=152549</ref>

	== Monitoring Power and Thermal Issues ==		== Monitoring Power and Thermal Issues ==

Kenneth: /* Ignore Under Voltage Warnings */

2024-10-31T09:01:29Z

Ignore Under Voltage Warnings

← Older revision		Revision as of 09:01, 31 October 2024
Line 3,725:		Line 3,725:
	=== Ignore Under Voltage Warnings ===		=== Ignore Under Voltage Warnings ===

	If you want to live ignorantly, you can disable the warnings: <ref>https://forums.raspberrypi.com/viewtopic.php?f=63&t=147781&start=50#p972790</ref>		https://github.com/raspberrypi/documentation/pull/3064/files
			"If the power supply to the Raspberry Pi drops below 4.63V (±5%), the following icon is displayed."

			https://www.raspberrypi.com/documentation/computers/legacy_config_txt.html#avoid_warnings
			avoid_warnings=2 allows turbo mode even when low-voltage is present.

			If you want to live ignorantly, you can disable the on-screen warnings: <ref>https://forums.raspberrypi.com/viewtopic.php?f=63&t=147781&start=50#p972790</ref>

	/boot/config.txt		/boot/config.txt
	avoid_warnings=1		avoid_warnings=1

	# still get throttled, but no more ~~dmesg~~ warnings		# still get throttled, but no more on-screen warnings (still displays to console)
	$ vcgencmd get_throttled		$ vcgencmd get_throttled
	throttled=0x50005		throttled=0x50005
Line 3,742:		Line 3,748:
	$ vcgencmd get_throttled		$ vcgencmd get_throttled
	throttled=0x70000		throttled=0x70000

			=== Turbo Mode ===

			force_turbo=1

			disable_auto_turbo=1
			On Raspberry Pi 2 and 3, setting this flag will disable the GPU from moving into turbo mode, which it can do under particular loads.

			Setting any overclocking parameters to values other than those used by raspi-config may set a permanent bit within the SoC. This makes it possible to detect that your Raspberry Pi was once overclocked. The overclock bit sets when force_turbo is set to 1 and any of the over_voltage_* options are set to a value of more than 0. See the blog post on Turbo mode for more information. - https://www.raspberrypi.com/news/introducing-turbo-mode-up-to-50-more-performance-for-free/

			force_turbo

			Forces turbo mode frequencies even when the ARM cores are not busy. Enabling this may set the warranty bit if over_voltage_* is also set.

	== Monitoring Power and Thermal Issues ==		== Monitoring Power and Thermal Issues ==

Kenneth: /* Ignore Under Voltage Warnings */

2024-10-31T08:42:13Z

Ignore Under Voltage Warnings

← Older revision		Revision as of 08:42, 31 October 2024
Line 3,730:		Line 3,730:
	avoid_warnings=1		avoid_warnings=1

	If you want to live dangerously you can disable the warnings, and disable throttling:		# still get throttled, but no more dmesg warnings
			$ vcgencmd get_throttled
			throttled=0x50005

			If you want to live dangerously, you can disable the warnings, and disable throttling:

	/boot/config.txt		/boot/config.txt
	avoid_warnings=2		avoid_warnings=2

			# throttled will give something differently
	$ vcgencmd get_throttled		$ vcgencmd get_throttled
	throttled=0x70000		throttled=0x70000

Kenneth: /* Under Voltage Warning */

2024-10-31T08:40:23Z

Under Voltage Warning

← Older revision		Revision as of 08:40, 31 October 2024
Line 3,722:		Line 3,722:

	https://elinux.org/images/thumb/d/d1/RPI_Test_Points.JPG/400px-RPI_Test_Points.JPG		https://elinux.org/images/thumb/d/d1/RPI_Test_Points.JPG/400px-RPI_Test_Points.JPG

			=== Ignore Under Voltage Warnings ===

			If you want to live ignorantly, you can disable the warnings: <ref>https://forums.raspberrypi.com/viewtopic.php?f=63&t=147781&start=50#p972790</ref>

			/boot/config.txt
			avoid_warnings=1

			If you want to live dangerously you can disable the warnings, and disable throttling:

			/boot/config.txt
			avoid_warnings=2

			$ vcgencmd get_throttled
			throttled=0x70000

	== Monitoring Power and Thermal Issues ==		== Monitoring Power and Thermal Issues ==

Kenneth: /* Under Voltage Warning */

2024-10-30T16:36:03Z

Under Voltage Warning

← Older revision		Revision as of 16:36, 30 October 2024
Line 3,607:		Line 3,607:

	vcgencmd get_throttled		vcgencmd get_throttled

			<pre>
			$ vcgencmd get_throttled
			throttled=0x50000

			$ vcgencmd get_throttled
			throttled=0x50005

			1110000000000000010
			\|\|\| \|\|\|_ under-voltage
			\|\|\| \|\|_ currently throttled
			\|\|\| \|_ arm frequency capped
			\|\|\|_ under-voltage has occurred since last reboot
			\|\|_ throttling has occurred since last reboot
			\|_ arm frequency capped has occurred since last reboot
			</pre>

	-		-

Kenneth: /* Under Voltage Warning */

2024-10-30T16:34:33Z

Under Voltage Warning

← Older revision		Revision as of 16:34, 30 October 2024
Line 3,650:		Line 3,650:
	-		-

	root@mypi:~# vcgencmd get_throttled		root@mypi:~# vcgencmd get_throttled
	throttled=0x0		throttled=0x0

	This means it has '''never throttled''' (since boot).		This means it has '''never throttled''' (since boot).
Line 3,657:		Line 3,657:
	-		-

	$ vcgencmd get_throttled		$ vcgencmd get_throttled
	throttled=0x50005		throttled=0x50005

Kenneth: /* Under Voltage Warning */

2024-10-30T16:33:46Z

Under Voltage Warning

← Older revision		Revision as of 16:33, 30 October 2024
Line 3,607:		Line 3,607:

	vcgencmd get_throttled		vcgencmd get_throttled

			-

			<pre>
			\| Bit \| Meaning \|
			\|:---:\|---------\|
			\| 0 \| Under-voltage detected \|
			\| 1 \| Arm frequency capped \|
			\| 2 \| Currently throttled \|
			\| 3 \| Soft temperature limit active \|
			\| 16 \| Under-voltage has occurred \|
			\| 17 \| Arm frequency capped has occurred \|
			\| 18 \| Throttling has occurred \|
			\| 19 \| Soft temperature limit has occurred
			</pre>

			The bits represent:

			throttled=0x50000
			0101 0000 0000 0000 0000

			throttled=0x50005
			0101 0000 0000 0000 0101

			bits 0 & 16 - Under-voltage detected (has occured)
			bits 2 & 18 - Currently throttled (has occured)

	-		-