No output on displayport GTX 1070
Hi,
I'm attempting to use nouveau with a GTX 1070 on Pop OS. It works fine when the monitor is connected via HDMI.
But with the monitor connected via displayport, there is no output at all after the UEFI boot selector - my monitor shows no no signal. The machine still boots fine and is accessible via SSH.
I have disabled nvidia by blacklisting and the logs don't seem to show any signs of nvidia.
Graphics card: Nvidia GTX 1070
Monitor: LG 32QK500-W
Full dmesg log attached: kern.log
The kernel logs show a lot of messages like:
[Sun Jun 7 15:53:25 2020] nouveau 0000:29:00.0: disp: outp 03:0006:0f44: link rate unsupported by sink
[Sun Jun 7 15:53:25 2020] nouveau 0000:29:00.0: disp: outp 03:0006:0f44: training failed
Nouveau versions:
ankitp@pop-os ~> sudo apt list --installed | grep nouveau
libdrm-nouveau2/focal,now 2.4.101-2 amd64 [installed,automatic]
libdrm-nouveau2/focal,now 2.4.101-2 i386 [installed,automatic]
xserver-xorg-video-nouveau/focal,now 1:1.0.16-1 amd64 [installed
The Xorg logs dont seem to have any errors. They seem to detect the display is on DP-2 and set the resolution correctly:
207 [ 7.439] (II) NOUVEAU(0): Output DVI-D-1 disconnected
208 [ 7.439] (II) NOUVEAU(0): Output DP-1 disconnected
209 [ 7.439] (II) NOUVEAU(0): Output DP-2 connected
210 [ 7.439] (II) NOUVEAU(0): Output HDMI-1 disconnected
211 [ 7.439] (II) NOUVEAU(0): Output DP-3 disconnected
212 [ 7.439] (II) NOUVEAU(0): Using exact sizes for initial modes
213 [ 7.439] (II) NOUVEAU(0): Output DP-2 using initial mode 2560x1440 +0+0
214 [ 7.439] (==) NOUVEAU(0): Using gamma correction (1.0, 1.0, 1.0
Kernel version
ankitp@pop-os ~> uname -a
Linux pop-os 5.4.0-7634-generic #38~1591219791~20.04~6b1c5de-Ubuntu SMP Thu Jun 4 02:56:10 UTC 2 x86_64 x86_64 x86_64 GNU/Linu
lsmod output
ankitp@pop-os ~ [0|1]> lsmod | grep nouveau
nouveau 1949696 3
mxm_wmi 16384 1 nouveau
video 49152 1 nouveau
ttm 106496 1 nouveau
drm_kms_helper 184320 1 nouveau
i2c_algo_bit 16384 1 nouveau
drm 491520 6 drm_kms_helper,ttm,nouveau
wmi 32768 3 wmi_bmof,mxm_wmi,nouveau
ankitp@pop-os ~> lsmod | grep nvidia
ankitp@pop-os ~>
Is there anything I can do to help narrow down the issue or fix it?