Hi, what's the key sequence to trigger SYSRQ on Amiga? And what's the sequence if i'm redirecting the console via serial? Some context: i'm trying to collect a backtrace from my Amiga 1200 + Warp 1260[1] + flicker fixer that refuses to boot and shows a solid grey screen. By using a serial, i've seen it booting up to: ABCDGHIJK Linux version 6.6.30-amiga-00006-g809aa9a54cba (flag@amaterasu.local) (m68k-linux-gcc (GCC) 13.1.0, GNU ld (GNU Binutils) 4 Saving 454 bytes of bootinfo printk: console [debug0] enabled printk: Too late to register bootconsole debug-1 Amiga hardware found: [A1200] VIDEO BLITTER AUDIO FLOPPY A1200_IDE KEYBOARD MOUSE SERIAL PARALLEL A2000_CLK CHIP_RAM PAULA Zone ranges: DMA [mem 0x0000000040000000-0x000004dfffffffff] Normal empty Movable zone start for each node Early memory node ranges node 0: [mem 0x0000000040000000-0x000000004dffffff] Initmem setup node 0 [mem 0x0000000040000000-0x000000004dffffff] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 pcpu-alloc: [0] 0 Kernel command line: root=/dev/sda4 debug=ser earlyprintk console=ttyS0,9600n8 Dentry cache hash table entries: 32768 (order: 5, 131072 bytes, linear) Inode-cache hash table entries: 16384 (order: 4, 65536 bytes, linear) Sorting __ex_table... Built 1 zonelists, mobility grouping on. Total pages: 56840 mem auto-init: stack:all(zero), heap alloc:off, heap free:off Memory: 221284K/229376K available (3753K kernel code, 472K rwdata, 1184K rodata, 172K init, 149K bss, 8092K reserved, 0K c) SLUB: HWalign=16, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 start_kernel::941 start_kernel::976 NR_IRQS: 32 clocksource: ciab: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 2694272661900 ns start_kernel::990 start_kernel::994 start_kernel::998 start_kernel::1000 start_kernel::1006 start_kernel::1009 I've added some printk around init/main.c::start_kernel() and it *appears* to be hanging in "local_irq_enable();". I've tried all stable LTS kernels from 4.4.y to 6.6.y, and they all shows the same exact symptoms. Hope it rings a bell. 1: https://amigawarp.eu/product/warp-1260-board-for-amiga-1200/ -- bye, p.
