> On Mon, 2018-01-01 at 09:54 +0100, Matthias Apitz wrote: > > El d?a domingo, diciembre 31, 2017 a las 10:19:50a. m. -0700, Ian Lepore escribi?: > > > > > > > > > > > > > I will let the C720 over night under power while sitting in the boot menu, > > > > maybe this will fix the RTC battery issue. > > > > > > > Last time I worked on RTC stuff, cleaning this up got put on my "to-do > > > some day" list. ?I think maybe that day has arrived. > > > > > > -- Ian > > For the moment we solved the issue by booting some older r28nnnn > > memstick, writing a correct date with ntpdate into the RTC and rebooted > > without poweroff. It seems that the RTC survives even some short > > powercyle. > > > > The CMOS battery is soldered on the motherboard of the Acer C720, i.e. > > no chance to be replaced. > > > > The issue must be fixed in FreeBSD, i.e. it should boot even with a > > broken RTC. Should I file a PR for this? > > > > I'm happy to test any patch for this. > > > > matthias > > > > Okay, I've created a pair of patches for this. ?The first adds some > common support routines usable by all RTC drivers with BCD hardware. > ?The second one converts the atrtc driver to use those routines. ?The > common code was tested using an i2c RTC chip, but I don't have an x86 > testbed, so the atrtc patch is currently untested (it compiles). Would the rtc.c emulation in bhyve work for testing? usr.sbin/bhyve/rtc.c > > The patches are available in a pair of phabricator reviews, plus I'll > attach them to this mail. ?If the list scrubs the attachements, you can > download the patches from the phab urls below, just hit the Actions > button and look for Download Raw Diff. > > https://reviews.freebsd.org/D13730 > https://reviews.freebsd.org/D13731 > > -- Ian -- Rod Grimes rgrimes_at_freebsd.orgReceived on Tue Jan 02 2018 - 04:50:00 UTC
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