![]() ![]() ![]() I've been remedying suspend issues on other Linux machines for the past 5 years, but have never seen anything that literally throws a CMOS error and resets your BIOS. I know there are a lot of known suspend issues, but this is not one of them, I believe. This error only occurs after waking from suspend. If I put the computer to sleep, upon waking it, I'll get a "CMOS checksum error," which'll cause the BIOS to reset immediately (Secure Boot = Enabled is the default value it resets to), which'll cause the BIOS to not detect my boot drive whatsoever, so I need to go to the BIOS and disable Secure Boot again after force shutting the machine down from its error state. The CMOS battery is practically BRAND NEW.Īfter disabling Secure Boot, everything works absolutely perfectly with this computer EXCEPT: I'm running Xubuntu 18.04.01 LTS on an HP Stream 14 (14-CB108CA). Apart from that, check your CMOS battery and if required, change or replace it. ![]() If you are unable to see the Recovery screen, hold power button to shut down the system. To fix the CMOS Checksum error, you can try resetting BIOS Defaults or updating your BIOS. The only other existing post about my issue ( Ubuntu 18.04 on HP Stream 14 - Suspend Produces Checksum Error ) doesn't help much. Al encender el ordenador, seguramente junto al error CMOS Checksum en la BIOS con sistema operativo Windows podremos ver que nos ofrece algunas opciones como pulsar la tecla F1 para reanudar el sistema o cargar valores predeterminados presionando F2, pero ello solamente reiniciar el PC y no se solucionar el problema de fondo. Once the Recovery screen is displayed, click or tap on the See advanced repair options button. Since I would find it unlikely that they have both broken in the same way, I guess the only test left is to flash the firmware on the main board.First post/first time asking anything in any forum ever! So the problem must be in the main boards. The reset jumper is also in the proper position (no reset). Removed battery and put the new battery in: it does not retain the settings. I have performed another test on another computer I am trying to repair. So, I have ruled out the case that the new battery is bad. Unplugged again, removed new battery, put old battery from bad computer in, plugged, set up time and date, shut down, unplugged, waited for a few minutes, plugged, booted: settings are NOT THERE.Unplugged again, removed battery, put new battery (the one I had used to test the bad computer as described above) in, plugged in, booted, set up time and date, shut down, unplugged, waited for a few minutes, plugged, booted: settings are there.Unplugged computer with its own battery on, waited a minute or two, plugged again, booted: settings are there.it does not lose BIOS settings between reboots. But the behaviour has not changed: after switching off and disconnecting the power cable, the next time I switch on, the CMOS settings are lost and the error message is printed again.Īny suggestions as to what I should check next?įollowing the suggestions contained in the answers and comments, I performed a few further tests using another computer that I know is working properly, i.e. My first explanation was that the CMOS battery must be empty so I bought and installed a new one. Indeed, the time, date, and boot device priority are reset and the values I had set up before switching the computer off are gone. I am repairing a computer with an ASUS M2NBP-VM CSM ACPI motherboard (I am not sure this is the correct description of the motherboard but, at least, this is what gets printed to the screen during boot).ĭuring boot, I get the following error message: CMOS checksum error - Defaults loaded ![]()
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