On 1 September 2016 at 15:01, Michael Hill via talk <[email protected]> wrote: > On Thu, Sep 1, 2016 at 2:52 PM, Matt Price via talk <[email protected]> wrote: > >> My THinkpad T440s is having some serious issues with suspend -- at times >> it will enter a hard freeze while suspended, requiring a hard reset with the >> manual reset button; at times it won't suspend at all, but enter a similarly >> unresponsive, blank-screen state from which it cannot be accessesd, >> requiring a soft reset with the power button; and at other times it will >> suspend just fine. > > > I'm running Fedora Rawhide on my aging ThinkPad SL410. For a few days last > week I had the same experience with suspend. After a kernel upgrade (from > one 4.8.0 release candidate to another), suspend started working again.
I'll second the implicit "probably a kernel issue." I had a year's worth of problems with suspend on my primary system. Every time Ubuntu issued a new kernel, I'd try it, and then revert to a working kernel that - by the time they fixed the regression - was a year old. For a while I was running xrandr to switch off the external screen before I suspended, and then running it again to turn the external screen back on after resume because I had empirically proven that was the problem. As for logging - it seems that logging doesn't happen on a broken suspend. I looked everywhere and never had any luck (I had lots of time to look). Debugging suspend turns out to be remarkably nightmarish: the kernel maintainers want you to let the kernel write to your RTC, because it's the only thing that survives a reboot. Of course, it no longer works as a clock. And you have to retrieve the data within three minutes or it'll be overwritten. All on the off-chance that the data retrieved will tell THEM something - not you. I didn't follow through on that. Look at the kernel first by trying old kernels, see if suspend is stable there. Then accuse the hardware. Good luck. -- Giles http://www.gilesorr.com/ [email protected] --- Talk Mailing List [email protected] https://gtalug.org/mailman/listinfo/talk
