Public bug reported:
The 5.4 kernel doesn't provide a DTB for the 3A+ and the firmware falls
back loading the DTB for the 3B+. That's not pretty and the brcmfmac
driver also tries to load the 'wrong' NVRAM file.
MESS:00:00:01.823728:0: dtb_file 'bcm2710-rpi-3-a-plus.dtb'
MESS:00:00:01.833563:0: dtb_file 'bcm2710-rpi-3-b-plus.dtb'
MESS:00:00:01.842337:0: brfs: File read: /mfs/sd/bcm2710-rpi-3-b-plus.dtb
MESS:00:00:01.847427:0: Loading 'bcm2710-rpi-3-b-plus.dtb' to 0x3000000 size
0x6fd3
** Affects: linux-raspi (Ubuntu)
Importance: Undecided
Status: Invalid
** Affects: linux-raspi (Ubuntu Focal)
Importance: Undecided
Status: New
** Also affects: linux-raspi (Ubuntu Focal)
Importance: Undecided
Status: New
** Changed in: linux-raspi (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1971971
Title:
Missing DTB for 3A+
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