Created attachment 215871 [details] wake kernel oops Sometimes, on my machine, after some suspend/wake cycles, i get a crash on waking. Attach is the screenshot of the kernel stack. As it requires several suspend/wake cycles, it is hard to reproduce, but maybe the stack helps to find where is the problem.
please 1. reboot your kernel parameter "idle=poll" 2. run "echo 0 > /sys/power/pm_async" before suspend 3. try suspend/resume and check if the problem still exist. 4. if no, please repeat your suspend/resume test, but with step 1 OR step 2 only, and see which one makes the problem gone.
Created attachment 218761 [details] updated kernel oops Tried this and still crashes. Attach is one of the crash, but after several of then and comparing, they are more or less the same. Any new idea?
no. what kernel are you using? can you please try the latest upstream kernel, say 4.7-rc?
A panic was triggered when the device sd 0:0:0:0 could not be suspend and got a timeout. could you check what's the value of CONFIG_DPM_WATCHDOG_TIMEOUT in your kernel config file, and adjust it to a bigger one to see if it works.
ping
https://patchwork.kernel.org/patch/9275187/ https://patchwork.kernel.org/patch/9275189/ Above patches can help customize the timeout of dpm watchdog.
Sorry for the delay I have reverted to .config to the distro version and the problem disappear. On this new .config, i have no CONFIG_DPM_WATCHDOG_TIMEOUT. I will recompile again with the old .config with a different CONFIG_DPM_WATCHDOG_TIMEOUT and test. If it still fails, i will try to bisect the new and old .config to try to find the origin of the problem and will post the result