Re: [coreboot] re-enabling boot for ChromeOS

[Matt DeVillier]

Julius,

wouldn't he also need gbb_utility to set the flags, in addition to 
(CrOS) flashrom to
be able to read/write just the GBB region?  That's why I suggested he use my
ChromeOS Firmware Utility Script, since it would automatically download the
required binaries as well as ensure the flags were set to a sane value.

But as you, no need to change the flags as set to boot ChromeOS

cheers,
Matt

On 7/20/2016 5:56 PM, Julius Werner wrote:
> set_gbb_flags.sh is just a bash script and will run on any system that
> has flashrom installed (which it calls).
>
> With the 0x489 flags you should still see the Chrome OS firmware
> screen ("OS verification is turned off") for 2 seconds on boot. Just
> press CTRL+D during those two seconds to boot Chrome OS in developer
> mode from the internal SSD.

re-enabling boot for ChromeOS

[Matthias Apitz]

El día Wednesday, July 20, 2016 a las 11:00:28PM -0500, Matt DeVillier escribió:
> Julius,
>
> wouldn't he also need gbb_utility to set the flags, in addition to 
> (CrOS) flashrom to
> be able to read/write just the GBB region?  That's why I suggested he use my
> ChromeOS Firmware Utility Script, since it would automatically download the
> required binaries as well as ensure the flags were set to a sane value.
>
> But as you, no need to change the flags as set to boot ChromeOS

Thanks for the helping hints.

My C720 normally boots via SeaBIOS a FreeBSD operating system and there
are no such tools gbb_utility and flashrom. Is there any image which could
be copied with dd(1) onto an USB stick to boot from and have such
utilities?

Another question related to this: One of my C720 (I have two) from one
day to another does not do any beep with the pc-speaker, all other sound
is working fine. I asked in the FreeBSD mailing lists and one of the
hints was to check the BIOS configuration. I do not see any screens for this in
SeaBIOS, only one to select the boot device number if there are two
devices visible, the SSD and another USB device. Is there something I
could check or modify in the SeaBIOS?

Thanks

matthias

re-enabling boot for ChromeOS

[Matt DeVillier]

On Thu, Jul 28, 2016 at 7:36 AM, Matthias Apitz  wrote:
> El día Wednesday, July 20, 2016 a las 11:00:28PM -0500, Matt DeVillier
> escribió:
>
> My C720 normally boots via SeaBIOS a FreeBSD operating system and there
> are no such tools gbb_utility and flashrom. Is there any image which could
> be copied with dd(1) onto an USB stick to boot from and have such
> utilities?

you can either:
1) use my Firmware Utility Script as noted before (website w/full
instructions is now up), which will download flashrom, cbfstool,
gbb_utility as needed, or
2) boot ChromiumOS, one of Arnold the Bat's builds would work fine
> Another question related to this: One of my C720 (I have two) from one
> day to another does not do any beep with the pc-speaker, all other sound
> is working fine. I asked in the FreeBSD mailing lists and one of the
> hints was to check the BIOS configuration. I do not see any screens for
> this in
> SeaBIOS, only one to select the boot device number if there are two
> devices visible, the SSD and another USB device. Is there something I
> could check or modify in the SeaBIOS?

coreboot/SeaBIOS do not have any user-accessible settings like a
traditional PC BIOS/UEFI setup.  Furthermore, since you're running the same
(stock?) firmware, any settings related to the onboard sound would be
identical.  I suspect the difference is either hardware or OS related
> Thanks
>     matthias

re-enabling boot for ChromeOS

[Kevin O'Connor]

On Thu, Jul 28, 2016 at 02:36:12PM +0200, Matthias Apitz wrote:
> Another question related to this: One of my C720 (I have two) from one
> day to another does not do any beep with the pc-speaker, all other sound
> is working fine. I asked in the FreeBSD mailing lists and one of the
> hints was to check the BIOS configuration. I do not see any screens for this in
> SeaBIOS, only one to select the boot device number if there are two
> devices visible, the SSD and another USB device. Is there something I
> could check or modify in the SeaBIOS?

There isn't a way to ask a traditional BIOS to beep the speaker, so
I'm not sure why you got that recommendation.  It is possible to ask
the vgabios to beep, but I'd be surprised if FreeBSD uses that method.
(Since you're using a c720 you likely have the intel vgabios, and
debugging that, if it is relevant, would be painful.)

As a random debugging suggestion, you could try reproducing the
beeping case and pull the cbmem log and freebsd boot log, then try to
reproduce the non-beeping case and compare both logs to see if there
are any differences.

-Kevin