XPost: linux.debian.bugs.dist   
   From: bdrung@debian.org   
      
   On Thu, 2025-11-20 at 08:58 +0100, Uwe Kleine-König wrote:   
   > Hello Benjamin,   
   >    
   > 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   
      
   --    
   Benjamin Drung   
   Debian & Ubuntu Developer   
      
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