Driver rtc cmos needs updating
Exceptions can be made when using a dual-boot system; this is when the other operating system does not support or is not configured for an UTC hardware clock (by default, Windows uses localtime).In order to keep time properly, select the proper time zone so the system knows where it is located. systemd comes with the This environment variable defines formatting of dates and times.
To do so, enable the Set system time from RTC on startup and resume ( [*] Set system time from RTC on startup and resume (rtc0) RTC used to set the system time [*] Set the RTC time based on NTP synchronization (rtc0) RTC used to synchronize NTP adjustment [*] /sys/class/rtc/rtc N (sysfs) [*] /proc/driver/rtc (procfs for rtc0) [*] /dev/rtc N (character devices) init script can set the system clock on boot and sync system time to the hardware clock on shutdown.This is not possible on every laptop, please refer to the system service manuals located at com/support/manuals for your system to see if this method is possible.As well as the RTCRST Jumper, most Desktop systems have a Password Enable Jumper PSWD - Password enable.The [ ] Set system time from RTC on startup and resume [ ] Set the RTC time based on NTP synchronization [*] /sys/class/rtc/rtc N (sysfs) [*] /proc/driver/rtc (procfs for rtc0) [*] /dev/rtc N (character devices) Typically the hardware clock is used to setup the system clock on boot.This can be done by the kernel itself or by a boot service (init script).The system clock, provided by the kernel, is implemented as a simple count of the number of ticks that have transpired since the 1 January 1970 UTC. The hardware clock (also known as real-time clock or RTC) is typically a component on the mainboard.
It runs independent of the state of the operating system all the time, also when the computer is shutdown.
The information stored in the BIOS (Basic Input/Output System), known as ESCD (Extended System Configuration Data) can occasionally become corrupted due to a variety of situations such as power events, incorrect settings by the user, hardware incompatibility due to a specific setting, or a No POST or No Video scenario.
In these cases it is sometimes necessary to reset the BIOS or CMOS (Complementary metal–oxide–semiconductor) to "Factory Defaults", or in other circumstances, clear the NVRAM (Non-Volatile Random Access Memory) Caution: Be careful when altering BIOS settings.
Note: This is applicable to both Desktop and some Portable systems.
Portable systems however will require a door on the bottom or perhaps keyboard removal to access the coin cell battery.
Pins 1-2 once shorted will clear NVRAM and reset all ESCD Settings This is another method that can be used to reset the BIOS on the system by simply removing the CMOS coin cell battery and then clearing power from the system.