10-20-2019 02:53 PM
Laptop regularly self-hibernates after a thermal event. Problem started following an upgrade to the latest BIOS on the 10/10/2019. Problem occurs after almost exactly 2 hours, with a few extra occurences over shorter periods. The problem occurs when the machine is under extremely light load, typically with the CPU cores running at less than 40C.
Windows Event Log show:
The system was hibernated due to a critical thermal event. Hibernate Time = 2019-10-20T17:36:09.261312500Z ACPI Thermal Zone = \_SB.PCI0.LPCB.EC0.HEPZ _HOT = 353K
Timings from last power up event until thermal event:
10/10/19 - 01:59:51 03:13:19 11/10/19 - 02:00:59 00:50:09 00:42:01 14/10/19 - 00:02:50 00:34:52 01:04:09 15/10/19 - 02:00:57 00:04:03 16/10/19 - 01:07:00 00:22:08 17/10/19 - 02:00:55 02:00:58 18/10/19 - 02:00:57 00:54:00 02:00:58 19/10/19 - 02:00:56 20/10/19 - 02:00:57 02:00:58
The 2 hour mark cannot be a coincidence, as this has occurred 10 times give or take 60 seconds!
Using a CPU core monitor utility, it does indeed appear to get a high temperature reading on multiple cores, but only momentarily, and the fan does not cut in as it would when the machine is under load, leading me to believe this is a false reading.
The system resumes without problem, so no data is lost, but it is extemely annoying.
The following software was installed on the 10/10/19, coinciding with the start of the problem:
HP PC Hardware Diagnostics UEFI sp98383 v. 126.96.36.199
HP BIOS and System Firmware (R70) sp99341 v. 01.03.00
The machine perfomed flawlessly for a month before the update (new machine), hence I suspect the update.
The only fix I have tried thus far is to limit the maximum CPU utilization to 90%, which does not seem to have done anything.
Any help would be appeciated.
10-22-2019 08:32 AM
BIOS update just appeared in HP Support Assistant. Have now installed:
HP BIOS and System Firmware (R70) sp99568 v. 01.03.03
Note that this failed twice after selecting it for download and install, with the Support Assistant seemingly closing without starting the installed, requiring a reboot before it would launch again. After the second failure I clicked "Install Now" from the last Action Log entry and this successfully kicked of the installer.
We will see whether it makes any difference to the problem...
10-24-2019 05:25 AM
Have since had two more thermal events since the BIOS update, so it doesn't look like this has helped.
Have now installed another update, which may or may not help:
Intel Management Engine Driver sp99230 19188.8.131.528
11-14-2019 11:53 AM
This is still ongoing. Every 2 hours it suffers a thermal event and hibernates itself. If the machine is left in sleep mode, the timing alters and if it goes past 2 hours it seems to trigger a thermal event about 5 minutes after resuming from sleep. This really is an awfully annoying problem. Please FIX IT!
11-21-2019 07:52 AM - edited 11-21-2019 08:11 AM
Having got thoroughly fed up of the machine hibernating itself every 2 hours, I finally decided to try downgrading the BIOS to the original version. Accorinding to an advisory on the support website, this is not possible. So I am stuck with a broken BIOS and quite possibly a broken skull from banging my head against the wall.
Edit: Immediately after posting this, I re-read my initial post and discovered that the first BIOS version that exhibited the problem was actually 01.03.00, which is no longer available. Whilst I didn't note the version of the BIOS installed before the first update, the two versions of the BIOS available under "previous versions" are 01.02.01 and 01.01.06, and the advisory above states that you can't downgrade to 01.01.06. So I have just downgraded to 01.02.01, which appears to have installed successfully but for an error about being unable to install the firmware for the USB-C controller as it is a lower version (i.e. downgrade not allowed). So now we wait to see whether we can get past 2 hours....