On Mar 7, 2016 10:31 AM, "Pierre Labastie" <[email protected]> wrote: > > On 07/03/2016 18:16, Roger Koehler wrote: > >> >> >> On Mar 7, 2016 10:09 AM, "Pierre Labastie" <[email protected] <mailto:[email protected]>> wrote: >> > >> > On 07/03/2016 17:43, Roger Koehler wrote: >> >> >> >> The new Linux kernel (4.4.2) can't talk to my hardware clock. I used >> >> the exact same .config file I used for LFS 7.6, which works fine. I >> >> first noticed this when building LFS 7.9_rc1 (Linux 4.4.1). I'll try >> >> again with the latest kernel (4.4.4). >> > >> > Really the exact same .config file? It is amazing you do not have to run "make oldconfig" to set config options which appeared in new kernel versions). >> >> I tried defconfig the first time with no luck. >> > I really meant "make oldconfig": it runs the configuration script and just ask about new options. > >> >> Maybe "exact" isn't the right word. I started with that but ran it through menuconfig and just changed the revision from -lfs-7.6 to -lfs-7.9. >> > Ah, I see. I think that when doing that, the new options take automatically their default value (which might not be what you want). > > Anyway, I think the options concerning the hardware clock are of the form *_RTC_*. You could try: > grep RTC /boot/config-xxx > and see if ther is something weird (and/or compare the output to that of the config file for 7.6).
Interesting. Here is the only (non-comment) difference: < CONFIG_RTC_HCTOSYS_DEVICE="rtc0" > CONFIG_RTC_SYSTOHC_DEVICE="rtc0" There must be something different in the kernel itself that breaks it.
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