RTC access problem after kernel compile...
Hi!
After I compiled the 2.6.31.4 kernel I get the error
"Cannot access the hardware clock via any known method "
with 2.6.22... it worked all without errors
1) The mainboard is based on Nvidia Nforce 4
2) /dev/rtc exists...
3) hwclock causes the same error
4) I attach RTC relevant .config lines
Pls help :-)))))
hmmm.... something more:
hwclock: Open of /dev/rtc failed, errno 19: No such device.
No usable clock interface found.
Cannot access the hardware clock via any known method
and....
util-linux-2.13-pre7 (maybe a new version helps....)
After I compiled the 2.6.31.4 kernel I get the error
"Cannot access the hardware clock via any known method "
with 2.6.22... it worked all without errors
1) The mainboard is based on Nvidia Nforce 4
2) /dev/rtc exists...
3) hwclock causes the same error
4) I attach RTC relevant .config lines
Pls help :-)))))
hmmm.... something more:
hwclock: Open of /dev/rtc failed, errno 19: No such device.
No usable clock interface found.
Cannot access the hardware clock via any known method
and....
util-linux-2.13-pre7 (maybe a new version helps....)
CONFIG_HPET_EMULATE_RTC=y
CONFIG_PM_TRACE_RTC=y
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_DEBUG=y
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
CONFIG_RTC_INTF_DEV_UIE_EMUL=y
CONFIG_RTC_DRV_CMOS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
hwclock works for me and I have the below modules loaded
16:28:09# hwclock --systohc
16:28:46# lsmod|grep rtc
rtc_cmos 10092 0
rtc_core 15640 1 rtc_cmos
rtc_lib 2268 1 rtc_core
But I am on a much more recent system than you:
19:40:06$ uname -a
Linux dimstar 2.6.29.2-2-smp #5 SMP Fri May 22 23:04:34 EST 2009 i686 AMD Athlon(tm) 64 X2 Dual Core Processor 6000+ AuthenticAMD GNU/Linux
Check what you have with "make xconfig" in the Liux source directory. "Real Time Clock" is a separate entry in the "Device Drivers" section - ensure it is being built as a module (dot in the box) or is built-in to the kernel (tick in the box)
19:40:06$ uname -a
Linux dimstar 2.6.29.2-2-smp #5 SMP Fri May 22 23:04:34 EST 2009 i686 AMD Athlon(tm) 64 X2 Dual Core Processor 6000+ AuthenticAMD GNU/Linux
Check what you have with "make xconfig" in the Liux source directory. "Real Time Clock" is a separate entry in the "Device Drivers" section - ensure it is being built as a module (dot in the box) or is built-in to the kernel (tick in the box)
Running make xconfig in my old /usr/src/linux-2.6.22.9 directory, I see the RTC used to be a bit different. I had RTC class configured as a module, with only /sys/class/rtc/rtcN (sysfs), /proc/driver/rtc (procfs for rtc0) and /dev/rtcN (character devices) ticked below that. Make sure you have at least those
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thanks! :-)
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