Hello Benjamin, On Thu, Nov 20, 2025 at 11:11:07AM +0100, Benjamin Drung wrote: > On Thu, 2025-11-20 at 08:58 +0100, Uwe Kleine-König wrote: > > On Mon, Nov 17, 2025 at 02:05:41AM +0100, Benjamin Drung wrote: > > > On Wed, 2025-11-05 at 20:14 +0100, Uwe Kleine-König wrote: > > > > Can you try adding > > > > > > > > earlyprintk=serial,0x7e215040 > > > > > > > > to the kernel commandline. Not sure this activates the right procedures, > > > > maybe try it with the working kernel first. > > > > > > I tried with the working kernel 6.12.43+deb13-rpi but these were the > > > earliest lines: > > > > > > [ 4.116565] printk: legacy console [ttyS1] enabled > > > [ 4.129635] printk: legacy bootconsole [earlycon0] disabled > > > [ 4.147050] bcm2835-power bcm2835-power: Broadcom BCM2835 power > > > domains driver > > > [ 4.160972] mousedev: PS/2 mouse device common for all mice > > > [ 4.172622] i2c-bcm2835 20805000.i2c: Could not read clock-frequency > > > property > > > [ 4.186585] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer > > > > > > I tried with 6.12.57+deb13-rpi but that failed to boot and the > > > earlyprintk line did not give any additional logs. > > > > Can you please provide a full kernel log of the working kernel? > > dmesg log is attached. > > > Also please provide the output of: > > > > for f in /proc/tty/driver/*; do echo $f; sed 's/^/ /' < $f; done > > /proc/tty/driver/serial > serinfo:1.0 driver revision: > 0: uart:unknown port:00000000 irq:0 > 1: uart:16550 mmio:0x20215040 irq:53 tx:15629 rx:0 RTS|CTS|DTR > 2: uart:unknown port:00000000 irq:0 > 3: uart:unknown port:00000000 irq:0 > /proc/tty/driver/ttyAMA > serinfo:1.0 driver revision: > 0: uart:PL011 rev2 mmio:0x20201000 irq:81 tx:452 rx:980 RTS|CTS|DTR
OK, is
earlyprintk=serial,0x20215040
more communicative then?
Best regards
Uwe
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