Hijack away musv. I'm glad to know someone else has essentially the same problem. A few differences: my root directory, including /usr, is ext4, but everything else except for /boot (which is ext2) is btrfs. And I have a radeon video card, and I've tried since I last wrote both xorg radeon and the ati-drivers. No change in behavior. In 3.14.4 I can actually boot and do a little bit, but eventually things freeze. I'm convinced the problem is in the kernel, since 3.14.1 was completely useless and then in 3.14.3 I could at least boot to kdm and in 3.14.4 I could even do a little work. I think the fact that you have root in btrfs as well is the reason you can't get passed kdm's screen. I don't think nvidia has anything to do with your problem.Sorry for Hijacking your thread, but I have a similar problem.
Root is on btrfs
Nvidia-drivers-337.19
Gentoo-Sources-3.14.4
Gentoo Sources 3.13. runs fine even with Nvidia-drivers-337.19.
I use slackware at work, and today they just added 3.14.4 to the current version, so I'm going to install that at home (which has a pure, unadulterated Linux kernel) and see if things work. If so, then I know gentoo-sources has the bug; if not, then 3.14.4 is the culprit. Slackware is very conservative about adding new kernel versions, so it should be a good test.
