How to disable Etag headers in HP System management Homepage?

Hello All,

According to PCI DSS audit we have a request to disable Etag  in HP SMH. I use last version HP System Management Homepage v7.4.2.4.

This is output from request to HP SMH:

1. Accept-Ranges:
   bytes
2. Connection:
   close
3. Content-Length:
   1442
4. Content-Type:
   image/gif
5. Date:
   Tue, 26 May 2015 09:54:54 GMT
6. ETag:
   "5a2-50c3d889bbf00"
7. Last-Modified:
   Fri, 09 Jan 2015 19:55:08 GMT
8. Server:
   CompaqHTTPServer/9.9 HP System Management Homepage
9. Set-Cookie:
   Compaq-HMMD=0001-41a2d29a-038d-11e5-8dc2-81018fde6465-1432634094459826; path=/; Secure ;HttpOnly
10. X-Frame-Options:
    SAMEORIGIN

I googled and found several advices about it but no one works. Standard advice is to add these settings to httpd.conf:

Header unset ETag
FileETag None

I use Linux version pf HP SMH. There is two httpd.conf there:

/opt/hp/hpsmh/conf/original/httpd.conf

/opt/hp/hpsmh/conf/no.original/httpd.conf

I chenged both no nothing happens.

Is there anyone who did this succsesfully?

Thank you very much in advance!

Best regards,

Plamen Ivanov