Centos 7 won't boot > EDAC sbridge: Couldn't find mci handler

linux bios centos centos-7

5,929

It's a warning message from Linux kernel. If your board doesn't support ECC RAM you can disable the EDAC module creating the file /etc/modprobe.d/edac-blacklist.conf with this content:

blacklist i82975x_edac
blacklist amd64_edac_mod
blacklist skx_edac
blacklist e752x_edac
blacklist i5400_edac
blacklist i3200_edac
blacklist i5000_edac
blacklist ie31200_edac
blacklist edac_mce_amd
blacklist i3000_edac
blacklist sb_edac
blacklist pnd2_edac
blacklist i7core_edac
blacklist i7300_edac
blacklist x38_edac
blacklist i5100_edac

After rebooting, the message shouldn't appear again...

5,929

Author by

Bachalo

Updated on September 18, 2022

Comments

Bachalo over 1 year
Have a fresh Centos 7 + MATE install on a 1TB SSD. Everything WAS working fine. Not sure if this is the cause but was tweaking the BIOS(Asus X99A2) attempting a firmware update and the next time I tried booting into Linux my screen freezes with the 3 following lines
```
EDAC sbridge: ECC is disabled. Aborting
EDAC sbridge: Couldn't find mci handler
kvm: disabled by bios
[sdb] No Caching mode page found
[sdb] Assuming drive cache: write through
```
I've googled quite a bit and found similar errors(this following link is for an Ubuntu install) https://askubuntu.com/questions/69284...nd-mci-handler

but no definitive answers!

Pretty sure the first line regarding ECC is bogus since my MOBO doesn't support ECC RAM anyways. I'm confused as to whether this is a BIOS setting error or a Linux install error. I went ahead and made sure my BIOS was properly updated but still get the same error. I'd like to avoid having to reformat my SSD and reinstall everything from scratch!

I'm pretty well stuck and am hoping someone has a solution. Any feedback welcome. Thanks!
- Admin over 7 years
  
  Is the system crashed (kernel panic) or did the graphics not start correctly? Hot ctrl-alt-f2 to see if you can access a console when in this state.
- Admin over 7 years
  
  Pretty sure the error message is bogus and my issue was with Nvidia drivers not properly installed. I've read Ubuntu makes installing drivers easier...
Chaim Eliyah about 3 years

Is there any particular risk to this approach? All of the EDAC modules are for ECC RAM?
caligari about 3 years

That's a good point! Of course, the best approach is finding the involved module: with 16 modules it could be found in 4 reboots :wink: