Created attachment 101759 [details]
dmesg with drm.debug=1
With 3.16-rc2 my tripple screen setup breaks.
DisplayPort-0 connected 1920x1200 <- ok
HDMI-0 connected 1920x1080 <- (tv) resolution out of range
DVI-0 connected 1680x1050 <- ok
All screens work during bootup before X starts.
ddx driver 7.3.0.
Created attachment 101760 [details]
Can you attach the dmesg with drm.debug=1 before you start X? All the important information is cut off. E.g., boot into single user mode (append 1 to the kernel command line in grub).
Created attachment 101762 [details]
Created attachment 101763 [details] [review]
limit bpc to 10
Does this patch help?
Not really. Now i get a "no signal" error from my TV.
Created attachment 101773 [details] [review]
Does this patch help?
No, still no signal
Created attachment 101866 [details] [review]
Does this help? Can you also attach a copy of your vbios? To get a copy of your vbios:
(use lspci to get the bus id)
cd /sys/bus/pci/devices/<pci bus id>
echo 1 > rom
cat rom > /tmp/vbios.rom
echo 0 > rom
Created attachment 101887 [details]
I applied the latest patch on a vanilla source-tree and i still get no signal.
(In reply to comment #10)
> I applied the latest patch on a vanilla source-tree and i still get no
Correction - I get a "resolution out of range" with the latest patch
Created attachment 102075 [details] [review]
add deep color module option
This patch disables the deep color support by default which should resolve your issue. You can set radeon.deep_color=1 on the kernel command line in grub to re-enable it. Hopefully we can resolve this properly for 3.17 and enable deep color by default.
(In reply to comment #12)
> Created attachment 102075 [details] [review] [review]
> add deep color module option
> This patch disables the deep color support by default which should resolve
> your issue. You can set radeon.deep_color=1 on the kernel command line in
> grub to re-enable it. Hopefully we can resolve this properly for 3.17 and
> enable deep color by default.
Indeed it does. I've tested with 3.16-rc4 and all is well again. Sorry for the delayed reply. If I can be useful in further testing please let me know. Thanks.
-- GitLab Migration Automatic Message --
This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.
You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/drm/amd/issues/507.