Dear Debian Users, On Thu 20 Jul 2017 at 10:43:15 +0200, Sebastiaan L. Zoutendijk wrote: > Since I upgraded from jessie to stretch at the start of this month, I am > experiencing random hangs when my laptop (Clevo W950JU barebone) is connected > to AC. The screen freezes and if sound was playing it is repeated in a > 2-second loop. The system does not recover from this and does not respond to > any key, a short press of the power button, or SysRq commands. I have to shut > it down with a long press of the power button, which has caused considerable > filesystem damage over the past weeks. Nothing is written to the systemd > journal at the time of the hang, not even at log level 7.
Since the last message I have consulted a friend and we came up with a few more options. Booting the still-installed jessie-backports kernel did not solve the issue, neither did downgrading systemd to the version in jessie. When I booted with systemd.unit=multi-user.target I noticed that this issue does not happen in a non-graphical environment. With the idea that the issue might be X- or graphics-related, I first downgraded xorg and its input and video drivers to the jessie versions, but that did not solve it, neither did additionally downgrading libdrm and mesa. Instead of continuing to downgrade random packages, I tried to restore a back-up of my / filesystem from before the upgrade to stretch. Unfortunately my back-up program seems to have forgotten a few files, which turned out to include some very essential system files. I managed to restore part of the damage from a chroot on a live system, but it turned out to be beyond my capabilities to fix. I have since returned to my jessie installation and managed to recover /home by restoring from the back-up and rescuing missing files from the damaged filesystem. I will undo the downgrades in a moment as they were ineffective. So I am back to square one. For the time being I will keep running this system with acpi=off. I might try a fresh install later. Yours faithfully, Bas Zoutendijk -- Sebastiaan L. Zoutendijk | slzoutend...@gmail.com