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From:   Jeff Chua <jeff.chua.linux@gmail.com>
Date:   Sun, 19 Jan 2020 17:26:45 +0800
Message-ID: <CAAJw_ZuLTxxNyuYeAjhTY+ENQNiOMuQD2p2y2M9J0Urk2MNzKA@mail.gmail.com>
Subject: Re: No realtime clock (/dev/rtc) on new ThinkPad X1
To:     lkml <linux-kernel@vger.kernel.org>
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Fixed. Upgraded Lenovo firmware to N2QET18W (1.12 ).

Now /dev/rtc0 shows up!

My best.,
Jeff

On Fri, Jan 17, 2020 at 12:16 PM Jeff Chua <jeff.chua.linux@gmail.com> wrote:
>
> On Fri, Jan 17, 2020 at 11:46 AM Jeff Chua <jeff.chua.linux@gmail.com> wrote:
> >
> > Got installed Linux 5.5.0-rc6 on ThinkPad X1. CPU is i7-10510U (Comet
> > Lake) ... and /dev/rtc is missing.
> >
> > Linux is latest git pull (f4353c3e2aaf7f7d3c5a18271b368bf5292854c3)
> > CPU model name      : Intel(R) Core(TM) i7-10510U CPU @ 1.80GHz
> >
> > Am I missing something?
>
> I can confirm that the same kernel works on another ThinkPad (tried on
> P53 with i7-9750H) but not on X1.
>
> Jeff.