Package: src:linux Version: 6.1.170-1 Severity: important After a bookworm upgrade today to: Linux hostname 6.1.0-45-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.170-1 (2026-04 -30) x86_64 GNU/Linux Suspend to disk breaks. I have: - tested 'echo disk >/sys/power/state' directly, to bypass all other scripts/code - turned on printk @ 8, as per kernel.org suggestions, with no additional output on console Upon attempting to suspend to disk, the system goes into a semi-locked up state. It's clearly on, but eating CPU, and unwakeable. Note that this laptop has been rock-solid with sleep to disk for 2+ years, through bullseye, into bookworm, and all related kernel changes. .170/45 breaks it, .164/44 and prior are flawless. I've looked at console output, and both seem mostly identical, with no discernible pattern differences, until the console is suspended, eg: # echo disk >/sys/power/state [ 144.328638] PM: hibernation: hibernation entry [ 144.329110] (NULL device *): firmware: direct-loading firmware i915/adlp_dmc_ver2_16.bin [ 144.329275] (NULL device *): firmware: direct-loading firmware i915/adlp_guc_70.bin [ 144.329356] (NULL device *): firmware: direct-loading firmware iwlwifi-so-a0-gf-a0.pnvm [ 144.329372] (NULL device *): firmware: direct-loading firmware regulatory.db [ 144.329404] (NULL device *): firmware: direct-loading firmware regulatory.db.p7s [ 144.329421] (NULL device *): firmware: direct-loading firmware intel/ibt-0040-0041.ddc [ 144.329447] (NULL device *): firmware: direct-loading firmware intel/sof-tplg/sof-hda-generic-2ch.tplg [ 144.329493] (NULL device *): firmware: direct-loading firmware i915/tgl_huc.bin [ 144.329936] (NULL device *): firmware: direct-loading firmware intel/ibt-0040-0041.sfi [ 144.330138] (NULL device *): firmware: direct-loading firmware iwlwifi-so-a0-gf-a0-72.ucode [ 144.345769] Filesystems sync: 0.015 seconds [ 144.347015] Freezing user space processes [ 144.348632] Freezing user space processes completed (elapsed 0.001 seconds) [ 144.348673] OOM killer disabled. [ 144.358776] PM: hibernation: Preallocating image memory [ 145.280687] PM: hibernation: Allocated 1770628 pages for snapshot [ 145.280698] PM: hibernation: Allocated 7082512 kbytes in 0.92 seconds (7698.38 MB/s) [ 145.280708] Freezing remaining freezable tasks [ 145.282043] Freezing remaining freezable tasks completed (elapsed 0.001 seconds) [ 145.282211] printk: Suspending console(s) (use no_console_suspend to debug) With the new kernel, the laptop display goes blank after [ 145.282211] printk: Suspending console(s) (use no_console_suspend to debug) but the the rest of the suspend process does not proceed. It goes into a not-awake, not-suspending to disk state. I wish I could provide more info, but so far I cannot see anything overt, except the failure to proceed with suspend to disk and locking up instead. I notice there were a lot of ACPI changes to this kernel, and they look quite... "overhaulish" for a stable branch. Thanks
