Re: Raspberry Pi 3B Slow Boot-up

On Mon, Mar 14, 2022 at 9:50 PM Archimedes Gaviola <
[email protected]> wrote:

>
>
> On Mon, Mar 14, 2022 at 8:01 PM Mark Millard <[email protected]> wrote:
>
>> On 2022-Mar-14, at 02:55, Archimedes Gaviola <
>> [email protected]> wrote:
>>
>> > In the default config.txt file there is [pi4] line. If I'm going to
>> remove this [pi4] line, the boot-up process is very slow. Slow in a sense
>> that some extended time is observed as compared to the default. I already
>> tested emphasizing the boot_delay=1 but to no avail. The reason why I
>> removed it is because I want to change the settings of the HDMI display
>> resolution as changes will not take effect with the [pi4] line in RPi 3B.
>> >
>> > With 14.0-CURRENT (February 24, 2022 snapshot) I have described my
>> resolution here
>> https://lists.freebsd.org/archives/freebsd-arm/2022-February/001070.html
>> however with the latest 14.0-CURRENT (March 10, 2022 snapshot) it's no
>> longer possible. Any idea what's going on?
>> >
>> > Below is the default config.txt and my current config.txt for reference.
>> >
>> > freebsd@generic:~ % cat /boot/msdos/config.txt
>> > [all]
>> > arm_64bit=1
>> > dtparam=audio=on,i2c_arm=on,spi=on
>> > dtoverlay=mmc
>> > dtoverlay=disable-bt
>> > device_tree_address=0x4000
>> > kernel=u-boot.bin
>> >
>> > [pi4]
>> > hdmi_safe=1
>> > armstub=armstub8-gic.bin
>> >
>> > freebsd@generic:~ % cat /boot/msdos/config.txt
>> > [all]
>> > arm_64bit=1
>> > dtparam=audio=on,i2c_arm=on,spi=on
>> > dtoverlay=mmc
>> > dtoverlay=disable-bt
>> > device_tree_address=0x4000
>> > kernel=u-boot.bin
>> >
>> > hdmi_group=2
>> > hdmi_mode=11
>> > armstub=armstub8-gic.bin
>>
>> armstub8-gic.bin is specific to the BCM2711 and will not
>> work for the RPi3, as I understand.
>>
>> armstub=armstub8.bin is the default and is what was being
>> used for the RPi3 when the [pi4] was in place.
>>
>> You have the option of listing a [pi3] section last
>> (after the [pi4] section). To have a [pi3] section
>> be last, it should have an explicit
>> armstub=armstub8.bin line.
>>
>> Listing older RPi* models last is done because some older
>> RPi models ignore the [] notation and listing things last
>> overrides earlier assignments, in this case overriding
>> assignments for newer models. It is a safe notational
>> ordering convention, even for models that do support
>> the [] notation sufficiently.
>>
>> If one depended on RPi3 models processing [] notation,
>> if it does, then another option would have been to move
>> the [rpi4] line to be just before the
>> armstub=armstub8-gic.bin line, causing the RPi3 to skip
>> the assignment and use the default.
>>
>
>
> Hi Mark,
>
> Awesome, it works great! Below is my revised config.txt file now, no more
> boot-up delay and display resolution was effectively changed. Thank you so
> much for sharing your thoughts in well-explained details, now I learned.
>
> freebsd@generic:~ % cat /boot/msdos/config.txt
> [all]
> boot_delay=0
> arm_64bit=1
> dtparam=audio=on,i2c_arm=on,spi=on
> dtoverlay=mmc
> dtoverlay=disable-bt
> device_tree_address=0x4000
> kernel=u-boot.bin
>
> [pi4]
> armstub=armstub8-gic.bin
>
> [pi3]
> hdmi_group=2
> hdmi_mode=11
>

Hi Mark,

I did further testing and these two configuration settings (removing [pi4]
and armstub=armstub8-gic.bin lines) below will do too.

freebsd@generic:~ % cat /boot/msdos/config.txt
[all]
boot_delay=0
arm_64bit=1
dtparam=audio=on,i2c_arm=on,spi=on
dtoverlay=mmc
dtoverlay=disable-bt
device_tree_address=0x4000
kernel=u-boot.bin

[pi3]
hdmi_group=2
hdmi_mode=11

or

freebsd@generic:~ % cat /boot/msdos/config.txt
[all]
boot_delay=0
arm_64bit=1
dtparam=audio=on,i2c_arm=on,spi=on
dtoverlay=mmc
dtoverlay=disable-bt
device_tree_address=0x4000
kernel=u-boot.bin

hdmi_group=2
hdmi_mode=11

Thanks again for the help!

Archimedes


>