Juan's Blog

An updated list of tips and tricks for running Alarm on RPI

Fixing later RPI revisions not booting

Credit

Change /boot/config.txt, and in line 11 and 13, replace fdt_addr_r to fdt_addr

which will look like this:

# After modifying, run ./mkscr

# Set root partition to the second partition of boot device
part uuid ${devtype} ${devnum}:2 uuid

setenv bootargs console=ttyS1,115200 console=tty0 root=PARTUUID=${uuid} rw rootwait smsc95xx.macaddr="${usbethaddr}"

if load ${devtype} ${devnum}:${bootpart} ${kernel_addr_r} /Image; then
  if load ${devtype} ${devnum}:${bootpart} ${fdt_addr_r} /dtbs/${fdtfile}; then
    if load ${devtype} ${devnum}:${bootpart} ${ramdisk_addr_r} /initramfs-linux.img; then
      booti ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr};
    else
      booti ${kernel_addr_r} - ${fdt_addr};
    fi;
  fi;
fi

and run mkimage -A arm -T script -O linux -d boot.txt boot.scr or /boot/mkscr

Cant mount /boot

In later revisions of RPI, the default mmcblk device number starts from 0

You can check this in emergency shell by typing lsblk:

NAME        MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
mmcblk0     179:0    0 119.4G  0 disk
├─mmcblk0p1 179:1    0   200M  0 part /boot
└─mmcblk0p2 179:2    0 119.2G  0 part /

If so, your /etc/fstab should be edited to look like this:

# Static information about the filesystems.
# See fstab(5) for details.

# <file system> <dir> <type> <options> <dump> <pass>
/dev/mmcblk0p1  /boot   vfat    defaults        0       0

No sound in pipewire / alsa

If you encountered the following:

[alarm@alarm ~]$ aplay -l
aplay: device_list:277: no soundcards found...

or

[alarm@alarm ~]$ wpctl status
PipeWire 'pipewire-0' [0.3.85, alarm@alarm, cookie:1958233425]
 └─ Clients:
        31. WirePlumber                         [0.3.85, alarm@alarm, pid:461]
        32. WirePlumber [export]                [0.3.85, alarm@alarm, pid:461]
        35. wpctl                               [0.3.85, alarm@alarm, pid:483]

Audio
 ├─ Devices:
 │
 ├─ Sinks:
 │
 ├─ Sink endpoints:
 │
 ├─ Sources:
 │
 ├─ Source endpoints:
 │
 └─ Streams:

Video
 ├─ Devices:
 │
 ├─ Sinks:
 │
 ├─ Sink endpoints:
 │
 ├─ Sources:
 │
 ├─ Source endpoints:
 │
 └─ Streams:

Settings
 └─ Default Configured Node Names:

remember to add yourself to audio group:

[alarm@alarm ~]$ groups
wheel alarm
[alarm@alarm ~]$ sudo usermod -aG audio alarm

Alsa and should work after a re-login, but pipewire might require you to restart.

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Arguing that you don't care about the right to privacy because you have nothing to hide is no different from saying you don't care about free speech because you have nothing to say. – Edward Snowden