I have installed mandriva 2010 in my pentium 4 2.4Ghz mercury 845gv motherboard machine. AFter installation the machine does not booting the mouse pointer comes up and the machine get hangs i have choosen only gnome.
What to do.

Similary in mandriva 2009 the machine gets hanged sometimes while rebooting which mostly occurs if i opened and closed vlc players several times for watching movie.

Awaiting for your replies.

At which point in the boot process does the computer hang?
Does your motherboard require or use proprietary drivers?

You may need to turn off the boot splash to see the boot messages - this may mean booting from a live CD and mounting the HDD boot partition to get at mandrivas menu.lst file if you don't see a little message telling you how to get verbose mode while you boot. If you are dual-booting with mandriva 2009 then you can use that to edit the shared menu.lst

There is an erratum for 2010 related to Intel chipsets:
http://wiki.mandriva.com/en/2010.0_E..._graphic_cards

I tried to google for the mercury 845gv motherboard info you give but was not too successful. It does seem that the 845 uses i915: http://patchwork.kernel.org/patch/36890/

So, I don't know that your video comes from the 845 chip or not but it would not hurt to try the workaround detailed in the linked erratum:

Which is to say, when you see the boot menu, press F3 etc. I go about editing the boot command line a bit differently, that is, press ESC and ok the prompt to leave graphical boot. Then, the default entry is highlighted, ordinarily, or one can arrow up/down to choose the desired entry. At that point, press E to edit. The first, kernel command line is highlighted or arrow key can be used to switch between boot menu lines. Press E to edit the highlighted kernel command line. This line is displayed with the cursor at the end. Make a space and type

i915.modeset=0

at the end. Press Enter to commit the edit and B to boot. If that makes the difference, this switch can be added to the grub boot menu so that it applies automatically at each boot and we can detail how to do that.

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Thanks for the suggestion but no joy. In addition, '/dev/mem' is gone again. I should have mentioned earlier that KDE was working, after a fashion, before I did the uninstall of Oxygen. So I think that means it is not a kernel parameter issue but rather a missing pagkage issue.

That's the only oxygen-named package I've got installed. Is it installed there?