[SOLVED] F15beta RC2 hang on install

[chrismurphy]

Fedora-15-Beta-x86_64-DVD.iso
---verified in textGUI on boot from ISO
Macbook Pro 2011 (core i7)
VirtualBox 4.06
---defaults+4cores+1G RAM+20G dynamic disk+32MB vram

Boots fine from the iso image, I chose btrfs for installation
/dev/sda1 500MB /boot ext4
/dev/sda2 15000MB / btrfs
/dev/sda3 4+G swap

Chose default installation option (no customization, no additional repos). At "Packages complete:1119 of 1198" progress ends, mouse arrow frozen, unable to switch to other virtual consoles. On reboot in rescue mode, no anaconda log or anything useful in /var/logs. Obviously no dmesg either.

Tried it again, this time switching to console 4. No messages for ~4 minutes prior to the end of disk activity. I was able to switch among consoles 1-5 with no meaningful messages that had not already appears at the time the installation started. The instant I switch to console 6 I saw a gray screen (background for the GUI installer) but no status bar, no F15 logo, etc and at that point the mouse froze and I could no longer switch to other virtual consoles.

Tried multiple times, including changing the filesystem for / to ext4 without any change. Sometimes the hang occurs early in the install process, sometimes in the middle, sometimes near the end, without an apparent pattern.

The resolution (apparently) is to add the following kernel extension when booting from the installation DVD ISO. This was not necessary for Fedora 14 and vbox 4.04, either for installation or after installation.


clocksource=jiffies