This is just a quick status update. I am just checking if it rings any
bell. I am still doing more tests.
The machine where all these problems are happening is a HP Z4 G4, as
well as the other two in production. Until this morning it had BIOS
v01.76 dated 04/22/2019. Today I update the BIOS to v02.63 dated 10/28/2020.
After updating the BIOS, the behavior definitively changed. Now both
kernels (5.4.0-53-generic and 5.9.8) reboot unexpectedly instead of
locking. After re-enabling the console, expecting to capture something,
I could not see a lock or reboot. However the serial console, after
displaying the whole boot, locked, and I cannot use it to login.
Alberto Sentieri
On 12/14/20 12:18 PM, Alan Stern wrote:
We'll have to wait and see what the tests and debugging tools reveal.
As for the comment about the hardware being reliable -- in fact, you
can't be certain of this. It may be that your test is stressing the
hardware in a way that it never experienced during the prior six
months.
Alan Stern
