Christopher, I filed the report and subscribled you.
For others following here.
Did also find out in my case it happens when the monitor is attached
with a VGA cable.
It does not happen if I use a DVI cable to connect the monitor.
Still have to test have to test with monitor connected on HDMI
Public bug reported:
If I connect my monitor to my computer with a VGA cable, I have to stop
at the grub menu and add 'nomodeset' to the kernel options with all the
4.4.0-* kernels.
If I do not add 'nomodeset' to the kernel options, my monitor goes
blank, complains of no video signal, then goes
Symptoms are as reported by others. Whether it's during boot or
attempting to enable after boot up. Screen goes black, reports no video,
then goes to sleep.
When it happens on boot, I can hit 'Ctrl'+'Alt'+'Del' or hit the power
button and the machine will reboot or shut down so things are still
Don't know where mode setting broke, had my box set aside for a while,
so didn't get all my normal updating in.
I'm on Yakkety.
The most recent Ubuntu kernel that I have on my machine that did KMS was
4.3.0-5.16
None of the 4.4 kernels images work without adding nomodeset to the grub
options.
Had enough running time now to consider the issue closed, my best guess
is that it must have been some kind of firmware issue that was fixed by
the newer linux-firmware package, since I seem to be the only one that
was affected, changing the status of the bug.
** Changed in:
I'm a little hesitant to say this is fixed until I get more running
time, but since the framebuffer and linux-firmware packages were updated
I switched X back to using the radeon driver, ran for a while with no
lock ups, took the 'nomodeset' option out of the boot up and am
currently running Gnome
Have you tried booting with pci=nomsi ?
Nothing in /proc/interupts made it look like msi was being used, but I
tried the 'pci=nomsi' thing anyway, no difference.
There is a difference with the 'nomodeset' in there, in that it takes
longer for there to be a problem, less likely to be hard locked,
Public bug reported:
Binary package hint: xorg
Freezes at various times could be any time during boot or later. At
times I am able to switch to VT 1 and see error messages displayed.
Jun 2 12:03:49 ubuntu kernel: [ 578.361780] [drm:radeon_ib_schedule] *ERROR*
radeon: couldn't schedule
** Attachment added: system log since
http://launchpadlibrarian.net/49576192/syslog
** Attachment added: BootDmesg.txt
http://launchpadlibrarian.net/49575737/BootDmesg.txt
** Attachment added: Dependencies.txt
http://launchpadlibrarian.net/49575738/Dependencies.txt
** Attachment
I guess it should also be noted that I booted with some of my previously
installed kernels including linux-image-2.6.32-22-generic and the issue
is the same so it seems to be something in the mesa/xorg part of the
equation.
--
Xorg freeze drm radeon 'Faild to schedule IB'
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