Control: tags -1 + moreinfo Hi
On Wed, Sep 24, 2025 at 04:06:00AM +0000, Lloyd wrote: > Package: linux-image-amd64 > Version: 6.12.48-1 > Severity: normal > > Upgraded the kernel from linux-image-6.12.43+deb13-amd64 to > linux-image-6.12.48+deb13-amd64 via apt. > > On reboot into the new kernel, system was unreachable via SSH. Upon > checking the console, the system entered emergency mode awaiting > password to enter the emergency shell. Rebooting did not clear the > fault. > > Upon checking further, the system could not mount two file systems, > /boot and /boot/efi, which are both stored on onboard eMMC. All > other FS are stored on various other disks. When logged into the > emergency shell, I verified that device nodes /dev/mmcblk* did not > exist hence the above from /etc/fstab could not be mounted. Multiple > reboots into the new kernel could not clear the fault. > > I booted into the old kernel 6.12.43 and the system booted normally. > All filesystems mounted as expected. > > I then booted into the new kernel 6.12.48 again and the system > booted normally. Unable to reproduce after this point. > > I initially suspected hardware failure but this made no sense, as > the eMMC disk it was unable to detect contained the bootloader, > kernel, and initrd it was successfully running from to partially > boot. So GRUB could see it just fine, but the kernel could not. > > Relevant dmesg: > > [ 1.530670] mmc1: SDHCI controller on PCI [0000:00:1c.0] using ADMA 64-bit > [ 1.533312] mmc0: SDHCI controller on PCI [0000:00:1b.0] using ADMA 64-bit > [ 1.677950] mmc1: new DDR MMC card at address 0001 > [ 1.695380] mmcblk1: mmc1:0001 004GA0 3.69 GiB > [ 1.698606] mmcblk1: p1 p2 > [ 1.699469] mmcblk1boot0: mmc1:0001 004GA0 2.00 MiB > [ 1.700699] mmcblk1boot1: mmc1:0001 004GA0 2.00 MiB > [ 1.701879] mmcblk1rpmb: mmc1:0001 004GA0 512 KiB, chardev (244:0) > [ 8.356788] systemd[1]: Expecting device dev-mmcblk1p2.device - > /dev/mmcblk1p2... > [ 9.875619] EXT4-fs (mmcblk1p2): mounting ext2 file system using the ext4 > subsystem > > Relevant lspci: > 00:1b.0 SD Host controller: Intel Corporation Celeron N3350/Pentium > N4200/Atom E3900 Series SDXC/MMC Host Controller (rev 0b) > 00:1c.0 SD Host controller: Intel Corporation Celeron N3350/Pentium > N4200/Atom E3900 Series eMMC Controller (rev 0b) As I understand you are not able to reproduce anymore the problem. Before we though close the bug, can you report back if it makes a difference if you do a cold boot of 6.12.48 or a reboot from 6.12.43-1? I.e. please test both variants rebooting from 6.12.43-1 to 6.12.48-1 and then a cold boot into 6.12.48-1. Regards, Salvatore
