Re: [BUG-RT] RTC has been stopped-> long delay during boot, soft reboot->GRUB fails to call getrtsecs()

["Remy Bohmer" <l.pinguin@gmail.com>]

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Hello All,

Thanks to the hint of Dries, I discovered that there was a difference
in my kernel configuration and the kernel configuration of Ingo
I streamlined my configuration to that of Ingo, and now the slow boot
issue is completely gone. I do not understand the exact relation, but
it works for me.

Thanks to you all.

FYI: Attached I have put the differences I had to make to make it work.


Kind Regards,

Remy Bohmer


2007/1/5, Remy Bohmer <l.pinguin@gmail.com>:
> Hello Dries,
>
> Thanks for your reply, but as it looks a lot like the same problem, I
> want to mention that we do NOT have a Dell system here. It is a
> Fujitsu Siemens i945 motherboard. I also saw the problem about "long
> delays during boot by hwclock" on an old i845 Kontron Motherboard,
> running the same installation/kernel as I mentioned, which we were
> using for years and never showed this problems until we start using
> this kernel. The RTC clock that was stopped is only seen twice on this
> Fujitsu siemens board, not on any other.
>
> So, as it is not a Dell system ,and we therefor have a different BIOS,
> I doubt it is BIOS related. Further, I discovered that the problem
> also occured in a system that is not tickless. I can therefor exclude
> now that it is NOT related to the CONFIG_NO_HZ option, despite what I
> mentioned in my previous mail.
>
> In my case it also was NO battery problem, but removing the battery
> was the only way to reset the RTC to get it ticking again.
>
> We have enabled HPET in BIOS and kernel.
>
> I have tested the 2.6.20rc3-rt0 kernel of Ingo (as he suggested) by
> booting it a few times, and until now we have not seen this problem,
> but the long term will learn if it is really gone.
>
>
> Kind Regards,
>
> Remy Böhmer
>
>
>
> 2007/1/5, Dries Kimpe <Dries.Kimpe@wis.kuleuven.be>:
> > In-Reply-To: <3efb10970701020838n61db5388l94b2f0ed38073edd@mail.gmail.com>
> >
> > I found this mail on the LKML.org list, and didn't want to bother to
> > subscribe to the list, so I post this directly. Sorry ;-)
> >
> > I'm suspecting the problem is not related to the rt-kernel at all.
> >
> > This looks like a well known (but no real solution as far as I know)
> > DELL bios problem.
> >
> > * Somehow, the RTC gets corrupted and stops counting.
> > * On recent dell laptops (D420, a.o.) the BIOS sometimes checks the
> > clock (everytime a thorough BIOS check is done)
> > and just stops with the message "time-of-day clock stopped" (look for
> > this on google); On some systems, one can enter the BIOS setup at this
> > point,
> > causing the bios to reset the clock and solving the problem. On others
> > (like the D420), the only problem is to make the B IOS reinitialize the
> > clock.
> >
> > * Once the clock is corrupted, it never runs again (some say a reboot in
> > XP can solve it);
> >  It is NOT a battery problem. Just disconnecting the battery, causing
> > the BIOS to reinitialize NVRAM solves the problem.
> >
> > I use to have this problem on my D420, and it seemed to go away by:
> > - disabling the RTC interrupt in the kernel
> > - enabling the HPET timer RTC emulation
> >
> > More info:
> > http://www.ubuntuforums.org/showthread.php?t=176954
> > http://www.ubuntuforums.org/showthread.php?t=149565
> > https://launchpad.net/distros/ubuntu/+source/linux-source-2.6.15/+bug/43745
> >
> > Hope this helps.
> >
> >  Greetings,
> >  Dries
> >
> >
> >
> > Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
> >
>

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--- config.old	2007-01-05 17:22:43.000000000 +0100
+++ config.new	2007-01-05 17:20:31.000000000 +0100
@@ -1,7 +1,7 @@
 #
 # Automatically generated make config: don't edit
 # Linux kernel version: 2.6.19.1-rt15
-# Tue Jan  2 15:10:14 2007
+# Fri Jan  5 14:40:56 2007
 #
 CONFIG_X86_32=y
 CONFIG_GENERIC_TIME=y
@@ -154,6 +154,7 @@
 CONFIG_X86_USE_PPRO_CHECKSUM=y
 CONFIG_X86_TSC=y
 CONFIG_HPET_TIMER=y
+CONFIG_HPET_EMULATE_RTC=y
 CONFIG_NR_CPUS=10
 CONFIG_SCHED_SMT=y
 CONFIG_SCHED_MC=y
@@ -977,10 +978,10 @@
 # CONFIG_WATCHDOG is not set
 # CONFIG_HW_RANDOM is not set
 # CONFIG_NVRAM is not set
-# CONFIG_RTC is not set
+CONFIG_RTC=y
+# CONFIG_RTC_HISTOGRAM is not set
 CONFIG_BLOCKER=y
 # CONFIG_LPPTEST is not set
-# CONFIG_GEN_RTC is not set
 # CONFIG_DTLK is not set
 # CONFIG_R3964 is not set
 # CONFIG_APPLICOM is not set
@@ -996,7 +997,9 @@
 # CONFIG_NSC_GPIO is not set
 # CONFIG_CS5535_GPIO is not set
 # CONFIG_RAW_DRIVER is not set
-# CONFIG_HPET is not set
+CONFIG_HPET=y
+# CONFIG_HPET_RTC_IRQ is not set
+# CONFIG_HPET_MMAP is not set
 # CONFIG_HANGCHECK_TIMER is not set
 
 #
@@ -1328,7 +1331,35 @@
 #
 # Real Time Clock
 #
-# CONFIG_RTC_CLASS is not set
+CONFIG_RTC_LIB=y
+CONFIG_RTC_CLASS=y
+CONFIG_RTC_HCTOSYS=y
+CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
+# CONFIG_RTC_DEBUG is not set
+
+#
+# RTC interfaces
+#
+CONFIG_RTC_INTF_SYSFS=y
+CONFIG_RTC_INTF_PROC=y
+CONFIG_RTC_INTF_DEV=y
+# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
+
+#
+# RTC drivers
+#
+# CONFIG_RTC_DRV_X1205 is not set
+# CONFIG_RTC_DRV_DS1307 is not set
+# CONFIG_RTC_DRV_DS1553 is not set
+# CONFIG_RTC_DRV_ISL1208 is not set
+# CONFIG_RTC_DRV_DS1672 is not set
+# CONFIG_RTC_DRV_DS1742 is not set
+# CONFIG_RTC_DRV_PCF8563 is not set
+# CONFIG_RTC_DRV_PCF8583 is not set
+# CONFIG_RTC_DRV_RS5C372 is not set
+# CONFIG_RTC_DRV_M48T86 is not set
+# CONFIG_RTC_DRV_TEST is not set
+# CONFIG_RTC_DRV_V3020 is not set
 
 #
 # DMA Engine support