[Bug 106721] [i915] Linux machine hangs after several reboots

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106721

--- Comment #10 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to ccalderon from comment #9)
> I cloned the drm-tip kernel latest version and built it to get the .deb
> packages.
> Then, I installed the kernel in my machine updating the grub but when I
> reboot, the machine hangs after loading the drm kernel.

Possibly depends on your kernel config. You should probably start off with the
distro config from /boot. Also make sure you have the updated initramfs.

https://wiki.ubuntu.com/Kernel/BuildYourOwnKernel and relevant pages will help
you.

If all else fails, you might have a look at the drm-tip ppa, although I can't
endorse it in any way.
http://kernel.ubuntu.com/~kernel-ppa/mainline/drm-tip/current/

> Also, where exactly I have to put drm.debug=0x1e log_buf_len=4M or
> drm.debug=14 parameters to start debugging. Sorry that is not really clear
> for me.

Three basic options, 1) hit 'e' in grub menu before booting the kernel, and add
them to the kernel command line (needs to be done for each boot), 2) add them
to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub and be sure to run
update-grub afterwards (permanent), or 3) add them in modprobe configuration
(see man modprobe.d) (permanent).

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