On 11/06/2017 03:56 PM, Tony Lindgren wrote:
Hi,
- Grazvydas Ignotas notaz@openpandora.org [171105 23:23]:
Haven't noticed the "hot RAM" problem Tony reported - can poweroff
and then
start fine (no reboot because of unrelated and known ABE issue "clock: dpll_abe_ck failed transition to 'locked'").
I'm now guessing the hot reboot issue is related to the internal DLL
being
off on start-up. Just for curiosity, one more test to run would be to do the following:
Keep DDR voltage at 1.35V
Keep DDR internal DLL in u-boot
Stop DDR internal DLL later on in u-boot before starting kernel
See if kernel boots reliably and runs two instances of memtester 1900M
Yeah that seems to work.
But my board boots reliably at 1.35V even without any tweaks, and I've had a 2+ hour dual memtester run at no-tweaks 1.35V before crashing, so it's really hard to tell if something helps because it's so unpredictable. It's also hard to do longer tests because I don't want to leave the device unattended on stresses as it heats the battery so much.
GraÅžvydas