![]() 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. If the checksum is incorrect, the BIOS is assumed to be corrupt and the system installs a hidden copy of the BIOS to correct the problem, and the startup process continues. I know there are a lot of known suspend issues, but this is not one of them, I believe. CMOS Reset (502) The CMOS checksum is invalid During the startup process, the system performs a checksum test of the BIOS. My first explanation was that the CMOS battery must be empty so I bought and installed a new one. A damaged or dead RTC battery can also make this message appear. This error only occurs after waking from suspend. CMOS checksum error - Defaults loaded Indeed, the time, date, and boot device priority are reset and the values I had set up before switching the computer off are gone. CMOS checksum could become bad, if there was a power failure or the system was reset during BIOS boot. X lý tip tc - Cannot Recover ( ) Entry Processing Continue : Không th phc hi( ) X lý tip tc - Cannot Recover ( ) Entry, Entry Has a bad attribute (or link or size) : Không th phc hi( ) nhp, ni dung có thuc tính (hoc liên kt kích thc) b h - CMOS barrety state low: tình trng pin cmos yu (thay pin ng h Cmos. 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: Usually to guard your Bios software, your CMOS memory stores a specific value, each time you boot up your computer this value which is a number is checked against the stored value in the CMOS memory. ![]() I'm running Xubuntu 18.04.01 LTS on an HP Stream 14 (14-CB108CA). The CMOS Checksum Bad Error is an error that occurs when the CMOS values are incorrect. The only other existing post about my issue ( Ubuntu 18.04 on HP Stream 14 - Suspend Produces Checksum Error ) doesn't help much. ![]() First post/first time asking anything in any forum ever! ![]()
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