RetroBBS - comp.sys.raspberry-pi - Re: Getting a CM4 to boot from USB?

Getting a CM4 to boot from USB?

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From: pbyabmle@4wrd.cc (Bryan)
Newsgroups: comp.sys.raspberry-pi
Subject: Getting a CM4 to boot from USB?
Date: Thu, 4 Jan 2024 21:06:00 -0500
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by: Bryan - Fri, 5 Jan 2024 02:06 UTC

I recently picked up a Compute Module 4 Lite, not realizing that the
device is unable to boot from SD card. This is on me and my stupidity,
but I assumed that it would be able to boot from USB and what I can see
appears to confirm this.

I'm using a CM4 8GB Wireless board on a MCUZone CM4-4G carrier board
w/LTE modem. I have an official RPi power supply connected, and I have
network and HDMI cables connected. I've grabbed the latest release from
the Pi OS page and flashed it to a USB stick that I know will boot other
machines, using Win32DiskImager.

So, what I get here is the machine goes through some text on screen and
then it appears to restart, and I get the rainbow splash screen right
after a bit of activity on the USB stick.

It simply sits there and does nothing past this. I've tried using both
the 32 and 64 bit images, different USB sticks, different power supplies
including powering it from a big powered commercial USB hub that has
amps to spare. I'm missing something here, or I got a bad board. I'm
hoping someone has some insight into what I'm doing wrong.

Re: Getting a CM4 to boot from USB?

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Getting a CM4 to boot from USB?
Date: 05 Jan 2024 09:32:24 +0000 (GMT)
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by: Theo - Fri, 5 Jan 2024 09:32 UTC

Bryan <pbyabmle@4wrd.cc> wrote:
> I recently picked up a Compute Module 4 Lite, not realizing that the
> device is unable to boot from SD card. This is on me and my stupidity,
> but I assumed that it would be able to boot from USB and what I can see
> appears to confirm this.
>
> I'm using a CM4 8GB Wireless board on a MCUZone CM4-4G carrier board
> w/LTE modem. I have an official RPi power supply connected, and I have
> network and HDMI cables connected. I've grabbed the latest release from
> the Pi OS page and flashed it to a USB stick that I know will boot other
> machines, using Win32DiskImager.
>
> So, what I get here is the machine goes through some text on screen and
> then it appears to restart, and I get the rainbow splash screen right
> after a bit of activity on the USB stick.
>
> It simply sits there and does nothing past this. I've tried using both
> the 32 and 64 bit images, different USB sticks, different power supplies
> including powering it from a big powered commercial USB hub that has
> amps to spare. I'm missing something here, or I got a bad board. I'm
> hoping someone has some insight into what I'm doing wrong.

Not familiar with that board, but it seems like the USB A port(s) are
disabled if you have the LTE module plugged in?
https://www.aliexpress.com/item/1005001972265702.html

But I think the CM4 Lite should be able to boot from SD card, since they
don't have an eMMC flash chip that takes the place of the SD card?

For USB boot you may need to update the EEPROM on the CM4, which is easiest
done via an SD card boot. Did you try SD boot, and what happened?

Theo

Re: Getting a CM4 to boot from USB?

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From: tnp@invalid.invalid (The Natural Philosopher)
Newsgroups: comp.sys.raspberry-pi
Subject: Re: Getting a CM4 to boot from USB?
Date: Fri, 5 Jan 2024 10:13:15 +0000
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by: The Natural Philosop - Fri, 5 Jan 2024 10:13 UTC

On 05/01/2024 02:06, Bryan wrote:
> I recently picked up a Compute Module 4 Lite, not realizing that the
> device is unable to boot from SD card. This is on me and my stupidity,
> but I assumed that it would be able to boot from USB and what I can see
> appears to confirm this.
>
> I'm using a CM4 8GB Wireless board on a MCUZone CM4-4G carrier board
> w/LTE modem. I have an official RPi power supply connected, and I have
> network and HDMI cables connected. I've grabbed the latest release from
> the Pi OS page and flashed it to a USB stick that I know will boot other
> machines, using Win32DiskImager.
>
> So, what I get here is the machine goes through some text on screen and
> then it appears to restart, and I get the rainbow splash screen right
> after a bit of activity on the USB stick.
>
> It simply sits there and does nothing past this. I've tried using both
> the 32 and 64 bit images, different USB sticks, different power supplies
> including powering it from a big powered commercial USB hub that has
> amps to spare. I'm missing something here, or I got a bad board. I'm
> hoping someone has some insight into what I'm doing wrong.

That's what my Pi 4 did on one version of Bookworm.
Try a different version

--
A lie can travel halfway around the world while the truth is putting on
its shoes.

Pournelle must die!

computers / comp.sys.raspberry-pi / Re: Getting a CM4 to boot from USB?

Subject	Author
Getting a CM4 to boot from USB?	Bryan
Re: Getting a CM4 to boot from USB?	Theo
Re: Getting a CM4 to boot from USB?	The Natural Philosopher