Hello!

I'm running the latest wireless-testing.git kernel, which is 2.6.30-rc1
plus some wireless bits.  I use intelfb with kernel mode switching and
X11 using fbdev.  This runs on Fedora 10, fbdev driver is
xorg-x11-drv-fbdev-0.3.1-7.fc9.x86_64.

This worked fine with Linux 2.6.29, but after upgrading to 2.6.30-rc1
X11 hangs hard.

Bisecting found commit 66c1ca019078220dc1bf968f2bb18421100ef147 to be
responsible.  It can be reverted on top of 2.6.30-rc1, and the resulting
kernel is working fine.  The commit is called:

fbmem: fix fb_info->lock and mm->mmap_sem circular locking dependency

I'm especially concerned to see stable@kernel.org in the cc in the log.
This patch fails on two systems for me, so it's hardly ready for stable
kernels.

The kernel config (very minimal, I used it to speed up bisecting),
xorg.conf and lspci output are attached.

-- 
Regards,
Pavel Roskin