diff options
Diffstat (limited to 'results/scraper/launchpad-without-comments/1797262')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1797262 | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1797262 b/results/scraper/launchpad-without-comments/1797262 new file mode 100644 index 00000000..86821038 --- /dev/null +++ b/results/scraper/launchpad-without-comments/1797262 @@ -0,0 +1,20 @@ +qemu arm no longer able to boot RPI Kernels + +Since RPi Kernel 1.20170427, qemu is no longer able to emulate the Rasberry Pi, as the linux kernel is complaining about timing issues. + +Old kernel output - https://pastebin.com/wvkneNNF +New kernel output - https://pastebin.com/QTwgCkV2 + +Note that the actual error is caused by the kernel being unable to get the timing source for the mmc (Line 160), which causes an unable-to-mount-root panic. There are other issues with the serial port returning an invalid speed, which displays a divide-by-zero error, which is PROBABLY a symptom of the same root cause. + +This is simple to replicate - The last working kernel is available here: + +https://github.com/raspberrypi/firmware/tree/1.20170405/boot + +Download kernel7 and the dtb, and try to boot with (for example) + +qemu-system-aarch64 -M raspi2 -kernel kernel7.img -dtb bcm2709-rpi-2-b.dtb -serial stdio -sd noobs.img -append "root=/dev/mmcblk0p2 init=/bin/bash" + +This works, and boots successfully. + +However, if you replace the kernel7.img and dtb with ones taken from https://github.com/raspberrypi/firmware/tree/1.20170427/boot it will NOT boot because of various clock timing issues (as in the second paste) \ No newline at end of file |