Server console is not recovering from powersave mode
Issue
- On RHEL-5 below command worked to avoid the console blanking:
setterm -powersave off -blank 0
-
This no longer works for RHEL6. Console here means the default VGA screen output, which comes from IPMI redirected KVM.
-
Problem persists, even if the following kernel boot parameter is set:
"consoleblank=0"
- This is a problem for two reasons:
- The console is unusable
- After the power-save has kicked in the console is unreadable, so errors cannot be read.
-
Setting rd_NO_PLYMOUTH as a kernel boot parameter has not solved the problem either.
-
Once the console has gone into power-save mode it is impossible to get the screen to come back up, so any console messages cannot be seen.
-
The UCS blades http://www.cisco.com/en/US/products/ps10265/index.html do not use USB for their console access. Instead you browse to the UCS control system and from there you download a java based KVM over IP console.
Environment
- Red Hat Enterprise Linux 6
- Cisco UCS B200 Blade
- No local disk used
- 2 LUNS from EMC storage
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
