When trying to install F8T3 to an Acer Aspire 1690 laptop installation hangs both in graphical and text mode, last line being printed "Running /sbin/loader" At least FC5, FC6, and F7 have worked fine (on text mode). Hard to say what goes wrong as Shift+PgUp doesn't work but I didn't notice any special messages during boot.
What's the last lines on tty4? If you let it sit for 5-10 minutes, does it continue?
Last lines are approximately (wording is surely wrong but you'll know what I mean): Loading Synaptics driver loader used maximum depth of stack; 2500 bytes left loader used maximum depth of stack; 2300 bytes left loop: module loaded But you guessed right, after about 10 minutes installation proceeds normally.
And, does it say "clocksource unstable" on console 4 when it continues?
Yes, just after continuing the first line appearing on tty4 is "clocksource unstable".
*** This bug has been marked as a duplicate of 319441 ***
Reopening due to issues mentioned in Bug 319441.