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HATs and other add-ons • Re: M.2+ Hat nvme not being recognized.

One last test which you can do is
Add below to cmdline.txt

Code:

nvme_core.default_ps_max_latency_us=2500
add below to config.txt

Code:

dtparam=pciex1_gen=3
the first parameter will affect Autonomous Power State Transition (APST) - it disables the lowest APST mode.
The parameter in config.txt forces PCIe gen3 speed.

Start with adding the APST mode related command. Reboot, check your logs if the drive is working. Next add the paramter to config.txt (as PCIe is not officialy supported by Pi5), reboot and check again.
Report back if that makes any change.

P.s. In case you're already forcing gen3 make sure to change to gen2 and start test based on that.

Statistics: Posted by aBUGSworstnightmare — Thu Jun 27, 2024 5:08 am



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