On Fri, May 08, 2015 at 01:23:59PM +0000, Deucher, Alexander wrote:
> > -----Original Message-----
> > From: Dave Jones [mailto:davej at codemonkey.org.uk]
> > Sent: Thursday, May 07, 2015 7:48 PM
> > To: dri-devel at lists.freedesktop.org
> > Cc: Deucher, Alexander; Koenig, Christian
> > Subject: Radeon Verde displayport failure.
> >
> > I just bought a new radeon (1002:682c), to pair with my shiny new
> > displayport
> > monitor.
> > It shows a display during through the BIOS POST, and grub, but when the
> > kernel
> > starts up, it's a coin toss whether or not I get anything.
> > Sometimes it just goes straight into power saving.
> >
> > When I do get something on the console, it continues to boot and then X
> > starts up and
> > puts it into power saving too. Trying to flip back to tty1 doesn't light
> > up the
> > display again.
> >
> > I'm running On debian stable, with copied-by-hand verde_* firmware files
> > from the linux-firmware git tree.
> > Here's a log from the 4.0-rc2 kernel.
> >
> > Any other info I can provide ?
> >
>
> The link training with the monitor seems to fail periodically. You may have
> to play with the timing in the link training sequence. It looks like you
> also have some power management related issues. Does booting with
> radeon.dpm=0 on the kernel command line in grub help? Also does the monitor
> support audio? You might also try radeon.audio=0.
Pretty much the same story with those options..
[ 8.162285] [drm:si_dpm_set_power_state [radeon]] *ERROR* si_enable_smc_cac
failed
[ 8.170753] [drm:radeon_dp_link_train [radeon]] *ERROR* displayport link
status failed
[ 8.170778] [drm:radeon_dp_link_train [radeon]] *ERROR* clock recovery failed
I did manage to get it to display something for a while. By disabling DP1.2
with the
LCDs OSD, but then it would only do a maximum of 1024x768. And after a reboot,
I saw the same messages above, and straight to power saving.
Dave
