I have a Compaq 12XL125 laptop (uses the CyberBlade/i7 Trident chipset). I cannot install in GUI mode because the display is corrupted. It appears to be detecting the correct chipset, Xserver, etc., so the problem is presumably one of incorrect modelines for the LCD? I already have Linux installed on this laptop, and can provide a working XF86Config from XFree86 3.3.6 if that would be helpful.
what resolution are you trying? Have you tried other resolutions? What does the corruption look like?
I haven't tried any resolutions, because I don't get far enough to do that. It gets to the "running /sbin/anaconda - may take a while" (or whatever it says), starts up X, and I'm instantly dead at that point -- the screen is impossible to see to continue further. The screen corruption is that solid sheet of bright white - mottled grey that laptop LCDs do when you drive them at too high a refresh (well, at least that's the only time I've ever done it otherwise).
Does your laptop support running in 640x480? If not, you can run the installer in text mode by typing linux text at the install boot prompt. It should allow you to then setup X at the support resolution on your laptop. If this doesn't work please reopen this bug.
I finally managed to get the laptop to install in text mode. It failed to configure X. Running Xconfigurator manually got X configured for 3.3.6, but not for 4.0.1. The major problem both with the install and with the autoconfigure / Xconfigurator problems is probably that with XFree 3.3.6, this chipset uses the SVGA driver, but with XFree 4, it uses the Trident driver....
Does it work well with XFree86 4.0? There is a new Xconfigurator at http://people.redhat.com/teg/xc/ - please try that with the "--preferxf4" switch.
Please reopen this bug if you continue to have problems.