I am using Intel HD 400 Graphics on a laptop.

When I logout, I get a black screen with no cursor or anything. I have to hard reboot the system to get into linux again.

Working on RHEL 6 (gnome)

RHEL6 , so you do have access to the red hat knowledge base from the license you did buy .
https://access.redhat.com/knowledge/search

you will have to login to the red hat site with the account you set up when you bought the rhel support license

that sounds like a graphics issue

the required license gets you access to the red hat tech support

but RHEL 6 ( being a server OS ) is not a good choice for a laptop
Most laptops will "mostly" work "mostly" well

you can also have a look at the RHEL6 install docs
there is someplace in them a section on INTEL GPU chips

https://access.redhat.com/knowledge/...erprise_Linux/

I don't have the support subscriptiton.

buy the required support license
the standard 1 year for $299 is the recommended , but it is possible to use the $49 self support.
https://www.redhat.com/apps/store/desktop/

or

do not use RHEL and use one of the free rebuilds

CentOS6 or ScientificLinux6

However, when I installed and used RHEL 6 as KVM, I was able to logout and switch properly. No problems there but then why is it in physical machine?

sunveer, did you ever figure out a fix for the black/blank screen upon logout?

I have filed the bug and it was said that the problem will be fixed in RHEL 6.4 and till now I have not tried RHEL 6.4.

Thanks sunveer, I just downloaded and installed CentOS 6.4 on my Dell Latitude E5530 and this issue seems to be fixed. I can log out and then be presented with a login screen. No black screens and hard boots required. Do you think this fixed can be back ported to earlier releases, like 5.9? Thanks again for the information.

I don't think so.

Hello sunveer,

Do you know the bug number this was filed under and what package fixed the issue?

Thanks for your help.

Sorry!

I tried to find the bug filed by me but unable to find it, even not listed in "my bugs" section in my account.

No problem. Thanks for the effort. Antonio