i.MX ProcessorsのトピックRe: IMX8MN :- Disable automatic login application : hwrng

IMX8MN :- Disable automatic login application : hwrng

milav_soni — Wed, 16 Jun 2021 09:35:38 GMT

Hello all,

I have build an image for imx8mnano based custom board.

I have use "imx-linux-zeus -m imx-5.4.70-2.3.2.xml" bsp to generate an image.

When I power up my board and login in to console, following log are arriving continuously.

root@imx8mnevk:~# [ 42.723982] caam_jr 30901000.jr: 20000256: CCB: desc idx 2: RNG: Prediction resistance [ 42.731926] hwrng: no data available [ 52.963975] caam_jr 30901000.jr: 20000256: CCB: desc idx 2: RNG: Prediction resistance [ 52.971921] hwrng: no data available [ 63.203998] caam_jr 30901000.jr: 20000256: CCB: desc idx 2: RNG: Prediction resistance [ 63.211943] hwrng: no data available

I want to stop this application from kernel source.

can you please help me to find this content?

Thank You

Re: IMX8MN :- Disable automatic login application : hwrng

Bio_TICFSL — Wed, 16 Jun 2021 13:47:57 GMT

Hello milav,

Please check this link where auto login was disable:

https://community.nxp.com/t5/i-MX-Processors/Reg-Auto-Login-and-run-a-script-Automatically/m-p/289260

Regards

Re: IMX8MN :- Disable automatic login application : hwrng

trk_golf — Wed, 23 Jun 2021 22:50:43 GMT

Having same issue on imx8mm.

Not sure how auto-login solves the issue with the hardware random number generator.

@Bio_TICFSL, is there something more specific to help correct the root cause of these kernel messages?

Re: IMX8MN :- Disable automatic login application : hwrng

milav_soni — Thu, 24 Jun 2021 09:44:52 GMT

I have commented above kernel message in their respected files.

But I don't know how to disable the application.

Thank You

Re: IMX8MN :- Disable automatic login application : hwrng

linderpi — Thu, 02 Feb 2023 12:28:19 GMT

I have the same problem on an i.MX 8M Mini after introducing OP-TEE. Have you guys found a solution in the meantime?