I have a small system that I have been running Cantos 6.6-32 on, all is (was) well.
But I wanted to update, so I installed 7.0-64. From what I read one cannot upgrade from -32 to -64, and there are no versions of 7.x-32 on the Centos site, so I did a new install.
But now I find several anomalies;
1) no networking. running ifconfig, or "nmcli d" (or nmtui) do not show any ethernet adapter (only lo). (It has one, and it was running fine). In /etc/sysconfig/network-scripts/ there are no ifcfg-* files. I plugged in a USB WiFi adapter, and it works fine, so I have some connectivity, but not the regular Ethernet connection.
2) The desktop GUI, does not show the toolbar at the top, with access to the various tools and applications, clock, etc. However this does show up on the login screen - (Choose user).
3) The GUI (which I think by default is gnome) has colors wrong, although the "colors" configuration has the correct monitor, and seems to think it knows the right colors profile. One implication of this is that the login screen, the password field and other fields (and buttons?) flash briefly, and then disappear, and one has to login blind; same for any request for authentication using a pop-up password window. (The only way to get to settings, was to right-click on the desktop, and choose change background, then back navigate to the settings panel)
4) I also do not see the CD/DVD driver in /dev/cdrom -
I'd love to get back to my simple working system! Any hints?
As added below, I found that the install loader was using the monitor at correct resolution, but once booted it changed and was using a wrong resolution, which upon changing the display seems OK.
Also I find that I can do a net-install , so it downloads the entire image over the (Eth0) interface, and installs it, but when it boots, it is not recognized; do I need to do some other setup? but it is not even recognized as an available interface, although if/when I plug in the USB WiFi, it is listed as a network interface for setup.
Also; installing Centos 6.7, it does recognize and properly setup the eth0 network interface - which V7 does not.
lshw:: *-network description: Ethernet interface product: NM10/ICH7 Family LAN Controller vendor: Intel Corporation
It seems that this interface NIC card is one that C7 no longer bundles, although C6 did. Argh - will search for a driver.