Alan Beck

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since Apr 08, 2019
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Recent posts by Alan Beck

Just a quick update.

I downloaded ThrottleStop and disabled "Turbo" (Boost), the logic being that I think the CPU is boosting and overheating before the fans spin up... possibly due to breakdown of the Thermal Paste.

No crashes since, though the laptop is a tad more sluggish.

I have Thermal Grizzly thermal paste arriving tomorrow. I'll clean and apply the new paste and see if I can get Boost enabled with any stability.
4 years ago
Thanks for the rapid replies Tim.  Sorry yes its memtest86 that I've used, I couldn't get the other one (memtest86+) to boot. And its passing with flying colours (unfortunately, perversely). I really hope I don't need to go motherboard shopping.

When I ran Aida64 I had RealTempGT running, in the 1-2 seconds before the fan spun up, temps hit 96C!!! Then settled down to 80/75C for Core1/2.  I'm hoping the new thermal paste I've ordered will help though there is a small worry that I've fried something by even trying it, though the only reason I was trying it was to isolate the JVM crash problem so things weren't in great shape anyway.  It appears that the default themal throttling on the CPU is 100C.  I'd expect laptops to run hotter anyway but it seems unhealthy.
4 years ago
Thanks for the link, memtest is what is passing for me.  However, there has just been an interesting development.  I tried MemTest64, which runs in Windows - I expected this to pass as it will be able to test less RAM than memtest as it obviously can't test the RAM that Windows has already taken.  However, after about 5 minutes, I got a BSOD - irql_not_less_or_equal.  The subsequent 2 boots have hard locked windows - this is the first time I've had OS instability.

For "the lols" I've booted back into bootable memtest and everything is passing again.

Either way, the BSOD and subsequent hard locking of Windows implies the RAM.

EDIT: Worth noting that I did a stress test in Aida64 and my CPU throttles in the delay that it takes the fans to spin up... hoping the CPU isn't a gonner as thats a more expensive fix.  I've just bought some liquid metal thermal paste, will see if that helps.
4 years ago
Quick note, I've seen mention of Windows DEP (Data Execution Prevention) causing this, but I'd imagine that would only be the case if the JVM was doing something it shouldn't be doing (cause by bad RAM for example).
4 years ago
Hi Folks,

Apologies if this isn't the right forum for this, if not please let me know.  My problem is thus and hopefully someone can shed some light.

Both the programs I write AND Eclipse itself are frequently crashing - hard crashing with hs_err_pid* files .  It usually inside JVM.dll when it happens but I've seen it reference 'C' as well. The 'stack' is different every time, i.e. its never doing the same thing.

I have:

- Upgraded java to the latest (latest version of 8 and 11).
- Upgraded eclipse to the latest
- Run Windows updates to the latest.
- Ran virus scans with Avast, Malware Bytes and Windows Defender (all updated)
- Ran the Windows RAM test 2-3 times without issue
- Ran MemTest86 for 8 hours - no errors.
- Ran Prime 95 CPU load test (Small FFT and Blend) for 10 hours - no errors.
- Downloaded an SSD drive checker - no errors.
- Checked the graphics card driver was updated (Intel HD Graphics 620 + GeForce 940MX)
- Wiped the whole thing and reinstalled Windows.

Laptop is a Dell with an i7 7500U and 16GB RAM.

When I say frequent, its intermittant, it can be every 15 minutes for a while, then nothing for a few hours. Nothing else on the laptop appears odd or appears to be crashing.


Here is 1 example of a crash file created when the JVM crashed.

https://pastebin.com/rS7KWVFZ


Eclipse was a late 2018 in that crash, I updated to the latest 2019. Fresh workspace, crashed after 45 minutes.

https://pastebin.com/J2zXaptK

I'm assuming bad hardware but would have expected either Prime95 or MemTest to pick it up.

My gut is to just replace the RAM as its the most likely cause even if MemTest isn't finding anything, the odd thing being that the rest of the system appears stable.  No other programs are dying or crashing.  The laptop has been fine for about 2 years, so I'm wondering if its one of the Spectre/Meltdown updates.

Help appreciated!
4 years ago