Re: Thinkpad T430 random power off while sleeping
> I have a similar issue with the X220, the problem is a watchdog > timer, > that I suspect is in the Intel ME. It expires without being reset > and > forces the machine to restart. Or at least that is the cause of > that > happening on my X230's. I've ripped a few of them apart and > analyzed > their guts and found only the CPU and a few other chips are active > during suspend. I've probed all the buses of those other chips and > none > make a peep when the machine reboots, the only chip left active is > the > Intel ME chunk of the CPU, and for obvious reasons, I have no idea > what > it is doing, so I suspect it is the culprit. I think there is at least some aspect of software at play here however. I did not experience these issues while running Debian 9 on the machine. It could be that Linux uses some horrible hack to make suspend work reliably, but it does nevertheless work. > I gave up on the work a few months ago since it seemed easier to > just > accept that suspend isn't going to work and just use suspend-to-disk > or > just shut the machine down completely. I had intended to use suspend-to-disk with this machine, but I found that applications that use hardware acceleration (namely Firefox) do not function after resuming from suspend to disk. The specific symptom is that the application's window is just black with no visible contents. Restarting it does nothing. This is very likely a problem with inteldrm. Disabling hardware acceleration in FF fixes the problem, but makes it almost unusably slow. > If you want to do more, and have > access to a Windows machine, you can try pulling apart the Lenovo > drivers to see what the Lenovo-specific ACPI driver is doing when > the > machine goes into suspend. I don't, but I had planned to throw Windows on a spare disk and see if updating the firmware / BIOS / playing with the proprietary driver helps or yields any useful information. ... Maybe I should look at running coreboot on the T430, since it's supported now. Thanks for your detailed response!
Re: Thinkpad T430 random power off while sleeping
On 12/4/2018 2:12 PM, Charles A Daniels wrote: Closing the lid on the T430 causes OpenBSD to suspend, as per my setting for machdep.lidaction=1. This usually works as expected, but occasionally I take my laptop out of my bag to find it sitting on the xenodm login screen, not suspended, with the lid closed, having lost power and rebooted at some point after being suspended. I would like to collect further information so a bug report can be filed, but I feel that the above description alone is insufficient to constitute a useful bug report. To that end, I would like to solicit advice on what information can be collected and what debugging steps can be taken so that I can write a useful bug report. I'm running the 6.4 release, and I have run fw_update and syspatch periodically since install. I previously asked for help on r/openbsd[1], but still have not been able to either resolve the problem or gather sufficient information for a bug report. ~ Charles 1 - https://old.reddit.com/r/openbsd/comments/9v0u4w/t430_wakes_from_suspend_with_lid_closed/ I have a similar issue with the X220, the problem is a watchdog timer, that I suspect is in the Intel ME. It expires without being reset and forces the machine to restart. Or at least that is the cause of that happening on my X230's. I've ripped a few of them apart and analyzed their guts and found only the CPU and a few other chips are active during suspend. I've probed all the buses of those other chips and none make a peep when the machine reboots, the only chip left active is the Intel ME chunk of the CPU, and for obvious reasons, I have no idea what it is doing, so I suspect it is the culprit. I gave up on the work a few months ago since it seemed easier to just accept that suspend isn't going to work and just use suspend-to-disk or just shut the machine down completely. If you want to do more, and have access to a Windows machine, you can try pulling apart the Lenovo drivers to see what the Lenovo-specific ACPI driver is doing when the machine goes into suspend.
Thinkpad T430 random power off while sleeping
Closing the lid on the T430 causes OpenBSD to suspend, as per my setting for machdep.lidaction=1. This usually works as expected, but occasionally I take my laptop out of my bag to find it sitting on the xenodm login screen, not suspended, with the lid closed, having lost power and rebooted at some point after being suspended. I would like to collect further information so a bug report can be filed, but I feel that the above description alone is insufficient to constitute a useful bug report. To that end, I would like to solicit advice on what information can be collected and what debugging steps can be taken so that I can write a useful bug report. I'm running the 6.4 release, and I have run fw_update and syspatch periodically since install. I previously asked for help on r/openbsd[1], but still have not been able to either resolve the problem or gather sufficient information for a bug report. ~ Charles 1 - https://old.reddit.com/r/openbsd/comments/9v0u4w/t430_wakes_from_suspend_with_lid_closed/
