lkml.org 
[lkml]   [2019]   [Aug]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subject5.3.0-rc6: i915 fails at typec_displayport 5120x1440
Hardware: Dell Latitude 7400 2-in-1, Whiskey Lake, Intel 620

5120x1440 fails to display.

Next available mode 3840x1080 displays fine.

Is this a kernel, or a driver level issue? It fails both in Xorg and
Wayland, so seems something at the lower levels. This 49" monitor worked
fine on Latitude 7480 (Kaby Lake), so I'm thinking something with `i915`
module layer.

What should I try next?

```
leho@papaya ~ $ [-] uname
Linux papaya 5.3.0-rc6+gentoo+ #95 SMP PREEMPT Mon Aug 26 23:50:08 EEST 2019 x86_64 Intel(R) Core(TM) i5-8365U CPU @ 1.60GHz GenuineIntel GNU/Linux

leho@papaya ~ $ [-] xrandr
Screen 0: minimum 8 x 8, current 5120 x 1440, maximum 32767 x 32767
...
DP1 disconnected (normal left inverted right x axis y axis)
DP2 connected primary 3840x1080+0+0 (normal left inverted right x axis y axis) 1200mm x 340mm
5120x1440 59.98 + 29.98
3840x1080 59.97*+
2560x1080 60.00 59.94 59.98
1920x1080 60.00 60.00 50.00 59.94
1920x1080i 60.00 50.00 59.94
1600x1200 60.00
1280x1024 75.02 60.02
1280x800 59.81
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 60.00
800x600 75.00 60.32
720x576 50.00
720x480 60.00 59.94
640x480 75.00 60.00 59.94
720x400 70.08
HDMI1 disconnected (normal left inverted right x axis y axis)
HDMI2 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

leho@papaya ~ $ [-] xrandr --output DP2 --mode 5120x1440 --verbose
crtc 0: 5120x1440 59.98 +0+0 "DP2"
xrandr: Configure crtc 0 failed
crtc 0: disable
crtc 1: disable
crtc 2: disable
crtc 3: disable
screen 0: revert
crtc 0: revert
crtc 1: revert
crtc 2: revert
crtc 3: revert
```

--
Leho Kraav, senior technology & digital marketing architect

\
 
 \ /
  Last update: 2019-08-27 10:36    [W:0.025 / U:2.272 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site