[coreboot] SPI Flash Writeprotect

Naveed Ghori naveed.ghori at dti.com.au
Thu Mar 2 08:34:46 CET 2017

It was the MRC cache. :)
One issue however with disabling the cache is that we get a long 20-30s beep (annoyingly loud :)) on shutdown. Any idea why as it doesn't seem to do this with the MRC cache turned off.

I might start a new thread for this depending on response.
And again Thanks for the help in this regard.

-----Original Message-----
From: Naveed Ghori 
Sent: Tuesday, 28 February 2017 9:59 AM
To: coreboot at coreboot.org
Subject: RE: [coreboot] SPI Flash Writeprotect

Thanks all for your suggestions. I do have fast boot enabled (and probably MRC cache too). I will try to disable that.

Main issue was that we have had a unit not boot up at all and a unit not boot up properly (as in Windows logo would fade in and out but stay in that state without progressing).

Both issues were fixed by writing the same bios (using a programmer or if the system would boot) or flashrom. This write should however remove anything written by the system on first boot. This makes me think that the cache or whatever else is writing to the flash chip is causing the system to fail.

I will test and update once I know if it was the MRC writing to the flash.

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