This bug was fixed in the package linux-raspi - 5.4.0-1015.15
---
linux-raspi (5.4.0-1015.15) focal; urgency=medium
* focal/linux-raspi: 5.4.0-1015.15 -proposed tracker (LP: #1887056)
[ Ubuntu: 5.4.0-42.46 ]
* focal/linux: 5.4.0-42.46 -proposed tracker (LP: #1887069)
*
This bug was fixed in the package linux-raspi - 5.4.0-1015.15
---
linux-raspi (5.4.0-1015.15) focal; urgency=medium
* focal/linux-raspi: 5.4.0-1015.15 -proposed tracker (LP: #1887056)
[ Ubuntu: 5.4.0-42.46 ]
* focal/linux: 5.4.0-42.46 -proposed tracker (LP: #1887069)
*
** Changed in: linux-raspi (Ubuntu Focal)
Status: Confirmed => In Progress
** Changed in: linux-raspi (Ubuntu Focal)
Status: In Progress => Fix Committed
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** Description changed:
+ [Impact]
+
+ A Raspberry Pi 4B won't boot with 'dtoverlay=uart4'.
+
+ [Test Case]
+
+ Add 'dtoverlay=uart4' to /boot/firmware/usercfg.txt. Reboot. U-boot
+ won't load and the Pi is dead.
+
+ [Regression Potential]
+
+ Low. This only affects Pi 4Bs and only if uarts
** Summary changed:
- New ubuntu-20.04-preinstalled-server-arm64+raspi.img installed on R-Pi 4 does
not boot if usercfg.txt is edited
+ dtoverlay=uart4 breaks Raspberry Pi 4B boot
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