kernel 4.19.y freezes Raspberry B+
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Assessment
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Newbie friendliness
- 25/100
- Issue type
- Bug
- Clarity
- Needs clarification
- Activity status
- Stale
- Tech stack
- c, linux, raspberry-pi
- Domain
- embedded-iot, operating-systems
Research direction
Start by reviewing kernel.log and the reported kernel 4.19.y configuration, including the bcm2835_defconfig changes and the staging IL9486 driver. Compare the setup with the stable 4.4.y kernel and the listed Buildroot toolchain and firmware details. Done means identifying a reproducible cause or a focused subsystem and documenting evidence for the complete freeze.
Written by the indexing model from the issue text.
Description
Hi,
I have a problem, that kernel 4.19.y is freezing Raspberry B+ after few hours. Freezing does mean a complete freeze - all threads are dead - the device is not answering the serial debug interface or ethernet nor any led is on.
I have compiled the kernel by myself with buildroot 20.02 toolchain gcc 8.3.0 / glibc. The kernel has just a few changes to the bcm2835_defconfig (unneeded drivers disabled) and staging driver for tiny TFT IL9486.
The rootfs is a minimal buildroot embedded system. EXT4 with journaling disabled - mounted with noatime and nodiratime option. Minimal write accesses (once a day).
Firmware (bootcode.bin fixup.dat ...) are latest version dated 04/20/20.
The Raspberry is not overclocked. It seems not to be a power supply problem (kernel 4.4.y is running stable for months). The board is running with a core temperature of 38°C - RAM usage is 32 MB only - CPU usage 2% (before freezing). MicroSD seems to be OK (fsck).
Any suggestion? Here the kernel log:
- Dominant language
- C
- Stars
- 13.2k
- Forks
- 5.5k
- Avg merge
- 2d 21h
- Merged PRs (30d)
- 21
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