2291882_en-US

[#1]

Power consumption regression after suspend/freeze in BSP 6.6.36 (i.MX8MP)

Hello,

We are observing a power consumption regression on i.MX8M Plus when using the NXP RealTime Edge v3.1 BSP based on Linux 6.6.36.

After suspend/resume, the system consumes ~20% more power than before entering suspend. This happens with a very minimal hardware setup: only NAND and eMMC are connected (no USB, PCIe, Wi-Fi, ETH, etc.).

Comparison across BSPs:

• linux-imx BSP based on Linux 6.6.23 (non-RT): no issue, power consumption is correctly restored after suspend/freeze

• Realtime Edge 3.1 BSP Linux 6.6.36 (non-RT and RT): issue present

• Realtime Edge 3.3 BSP (Linux 6.12): no issue observed, power consumption is restored correctly

Please let us know if this is a known issue or if there are recommended patches or configuration changes.

If needed, we can provide device tree sources, kernel configuration, and any additional files required to help reproduce and analyze the issue.

Best regards,
Aitor

i.MX 8M | i.MX 8M Mini | i.MX 8M Nanoi.MXRTLinuxSuspected Software DefectYocto ProjectRe: Power consumption regression after suspend/freeze in BSP 6.6.36 (i.MX8MP)

Hello,

Sorry for that, but yes we have update the BSP, please download the real time edge 3.3.

Regards

Re: Power consumption regression after suspend/freeze in BSP 6.6.36 (i.MX8MP)

Hello,

Thank you for the reply.

We have already tested Realtime Edge 3.3 (kernel 6.12) and can confirm that the issue is not present there. However, upgrading to 3.3 is not an option for us at the moment, as we are currently based on Realtime Edge 3.1 and need to stay close to our existing kernel and BSP for compatibility reasons.

Since the problem is fixed in Realtime Edge 3.3, could you please point us to:

• The specific patch(es) or commit(s) where this issue was addressed, or

• Any recommended backport to BSP 3.1 / kernel 6.6.x

This would allow us to apply the fix without requiring a full BSP upgrade

Best regards,
Aitor

Re: Power consumption regression after suspend/freeze in BSP 6.6.36 (i.MX8MP)

Hi,

In this case you will have to ask to our professional services since some package that are needed in the 3.1 are update.

Regards