I'm using kernel 4.17 rc5 on Fedora 28 on a Dell XPS 13 9370 machine. Since upgrading to this kernel, I get the following message on boot: rtc_cmos 00:01: nvmem registration failed There is no indication of why it failed, and I'm not exactly sure what this means. After some digging, I found that this where the error message comes from: https://github.com/torvalds/linux/blob/master/drivers/rtc/rtc-cmos.c#L818 And this is the commit that introduced it: https://github.com/torvalds/linux/commit/8b5b7958fd1cac54bdca62ec5552c6be0b38def4#diff-4dcdf420d40078042c28f0f3d8d6535c There is also a user who reported it against Fedora: https://bugzilla.redhat.com/show_bug.cgi?id=1568276 In the bug report the user says he uses a Msi z370 pc pro motherboard, so I would assume the problem is not specific to my machine.
T have the same message. Lenovo T440p.
Same issue here on Fedora 28 as regression between kernel 4.16.16 and 4.17.2. My machine has an Intel core i5 650 cpu with a H55 chipset on an ASUS p7h55-m/usb3 mainboard. According to the downstream bug report, there's been a discussion: https://marc.info/?t=152724036300005&r=1&w=2 And a proposed patch: https://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux.git/commit/?h=rtc-next&id=c59b3715ac16544f8f68ab7af03f108e339b36aa This patch was already merged into the 4.18 development branch by linus: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/include/linux/rtc.h
I have the same error message on my HP HDX-18 1310eg machine at booting, since the upgrade from kernel 4.16.x to kernel 4.17.2 on Fedora 28 Kde-spin(64-bit, Intel platform). The machine runs without any further troubles and errors, this is the only one message.
Same error on 4.17.2-200.fc28.x86_64 kernel (AMD platform) rtc_cmos 00:02: nvmem registration failed