Date: Fri, 21 Feb 2020 10:17:54 +0100 From: =?utf-8?Q?S=C3=B8ren_Schmidt?= <soren.schmidt@gmail.com> To: "Russell L. Carter" <rcarter@pinyon.org> Cc: freebsd-arm@freebsd.org Subject: Re: Pinebook Pro instability problem and fix. Message-ID: <9E0ED9A6-B9B2-4ADF-BC66-14FC757DB194@gmail.com> In-Reply-To: <f226f0b5-ae4b-8cfb-7bab-d699689b300e@pinyon.org> References: <FC5409F5-2EF2-4A11-8D95-762D67D42D7F@gmail.com> <f226f0b5-ae4b-8cfb-7bab-d699689b300e@pinyon.org>
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> On 21 Feb 2020, at 00.45, Russell L. Carter <rcarter@pinyon.org> = wrote: >=20 > Hi S=C3=B8ren, >=20 > On 2020-02-20 13:10, S=C3=B8ren Schmidt wrote: >> Hi gang! >> I have been wrestling my Pinebook Pro instability problem for some = time. >> The problem was that if I just let it boot it would occasionally hang = silently, just lock up totally unresponsive, if I changed the clock = speed it would run stable. >> I finally figured out the problem and its actually quite simple. >> On boot we set all the regulators initially to their lowest possible = voltage, this in my case is too low to make the little cpu=E2=80=99s run = reliably. >> U-boot sets the lcpu voltage to 900mv and speed to 816Mhz, on boot we = re-adjust the voltage to 750mv which is too low for my cpus to work = reliably @ 816Mhz. >> I=E2=80=99ve added support for the regulator-init-microvolt setting = and set that to 900000mv as per spec in the DTS, and that solves the = issue. >> Now running all 6 cores with changeable frequencies and no problems = what so ever. >> Patches on request if needed=E2=80=A6 >=20 > This is -current I assume. Do you have Xorg up? My Pinebook Pro is > sitting on the table waiting for debian-testing to transition from > kernel 5.4 to 5.6 so that, possibly, maybe, X works again. >=20 > However, I'd ditch debian with prejudice if I could bring > up X on the Pinebook Pro with FreeBSD. No need for HW acceleration. > I also don't care much about the camera, microphone, etc. Yes this is -current. And no video drivers yet AFAIK. This at least for me makes it a stable platform to work on, headless for = now though, which makes progress a lot easier. However if nobody else is working on it I will look into getting = (simple) video going in the not too distant future, but time is sparse.. -S=C3=B8ren=
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