Hi I assume that "This happened with 4.6, but not with v4.5.", yes?
Do you have vPro system? Have you provisioned your ME device? If not, the iAMT watchdog should not be exposed to user-space and should not affect systemd. Do you have /dev/watchdog* with identity "iamt_wdt" at you system? Thanks -- Sasha -----Original Message----- From: Sebastian Reichel [mailto:s...@debian.org] Sent: Wednesday, June 15, 2016 02:44 To: Debian Bug Tracking System <sub...@bugs.debian.org> Subject: Bug#827323: linux: Regression v4.5 -> v4.6: system freeze after suspend/resume due to iAMT watchdog Source: linux Version: 4.5.5-1 Severity: normal Hi, My Lenovo Thinkpad X250 freezes a couple of seconds after resuming from suspend. This happened with 4.5, but not with v4.6. I bisected the problem using mainline kernel with Debian config to the following commit: sre@earth ~/src/linux (git)-[fdd9b86...|bisect] % git bisect bad fdd9b8655933c3eb3154fe1ed351c17b654258bd is the first bad commit commit fdd9b8655933c3eb3154fe1ed351c17b654258bd Author: Alexander Usyskin <alexander.usys...@intel.com> Date: Fri Jan 8 00:49:21 2016 +0200 mei: wd: drop the watchdog code from the core mei driver Instead of integrating the iAMT watchdog in the mei core driver we will create a watchdog device on the mei client bus and create a driver for it. This patch removes the watchdog code from the mei core driver. Signed-off-by: Alexander Usyskin <alexander.usys...@intel.com> Signed-off-by: Tomas Winkler <tomas.wink...@intel.com> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> My system was configured to use the watchdog via "RuntimeWatchdogSec=30" in "/etc/systemd/system.conf". After disabling the feature no system freeze happens after suspend/resume cycle. -- Sebastian -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (1000, 'testing'), (500, 'unstable'), (200, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386, armhf Kernel: Linux 4.6.0-1-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) --------------------------------------------------------------------- Intel Israel (74) Limited This e-mail and any attachments may contain confidential material for the sole use of the intended recipient(s). Any review or distribution by others is strictly prohibited. If you are not the intended recipient, please contact the sender and delete all copies.
