[coreboot] SPI Flash Writeprotect

John Lewis jlewis at johnlewis.ie
Thu Mar 2 10:58:12 CET 2017

Haven't the faintest idea, Naveed - have never tried running with the
cache disabled. Only thing I can tell you is that if the cache is
enabled, but not working for some reason, I didn't get such a beep.

I'm hoping one of the proper guys will have an idea about this.



On 02/03/17 07:34, Naveed Ghori wrote:
> 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.
> Cheers,
> 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.
> Regards,
> Naveed

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