Date: Fri, 21 Feb 2020 08:00:38 -0700 From: "Russell L. Carter" <rcarter@pinyon.org> To: =?UTF-8?Q?S=c3=b8ren_Schmidt?= <soren.schmidt@gmail.com> Cc: freebsd-arm@freebsd.org Subject: Re: Pinebook Pro instability problem and fix. Message-ID: <04f9b6d3-0d92-b93e-9ecf-c15722a58b59@pinyon.org> In-Reply-To: <9E0ED9A6-B9B2-4ADF-BC66-14FC757DB194@gmail.com> References: <FC5409F5-2EF2-4A11-8D95-762D67D42D7F@gmail.com> <f226f0b5-ae4b-8cfb-7bab-d699689b300e@pinyon.org> <9E0ED9A6-B9B2-4ADF-BC66-14FC757DB194@gmail.com>
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On 2020-02-21 02:17, Søren Schmidt wrote: > > >> On 21 Feb 2020, at 00.45, Russell L. Carter <rcarter@pinyon.org> >> wrote: >> >> Hi Søren, >> >> On 2020-02-20 13:10, Søren 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’s 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’ve 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… >> >> 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. >> >> 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.. Ok, thanks, good to know. It's a beautiful little machine and I look forward to bringing up -current on it in the next months. Russell > -Søren >
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