On Thu, Oct 10, 2013 at 07:38:56AM -0400, Bryan Chapman wrote: > On 10/10/13 05:34, Marc Espie wrote: > >On Wed, Oct 09, 2013 at 05:36:22PM -0400, Bryan Chapman wrote: > >>Just installed the Oct 3rd snapshot on my desktop. During the boot > >>process it loses console output and just shows a blank screen. The > >>screen doesn't go into power saving - just no output. At first I though > >>the machine froze, but it continued running and I was able to SSH into > >>the machine. Here is the DMESG. Looks like some issues with DRM. At a > >>bit of a loss on the next troubleshooting steps, any ideas? > >> > >Exact same issue here... drm effect. > >boot -c > >disable radeondrm > >then install the firmware manually (firmware-update will not see it > >unfortunately). Then reboot. > > > >If your machine has network, jsg would probably be happy to see what's > >going on in /var/log/messages while the machine loses boot... > Thanks -- installing the firmware package resolved the issue. I > just assumed that the firmware updater would grab it if needed.
According to jsg@, the KMS code is able to figure out that the firmware is needed, and not do the video change if it's not installed. Obviously, that still fails from some cards: the KMS code doesn't get an error, and the video change still occur. So a log of what the kernel says when it's switching while not having the firmware would be useful for trying to fix that...
