[Bug 111501] New: [CFL] Kernel 5.3.0-rc6: i915 fails at typec_displayport 5120x1440
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Tue Aug 27 12:25:30 UTC 2019
https://bugs.freedesktop.org/show_bug.cgi?id=111501
Bug ID: 111501
Summary: [CFL] Kernel 5.3.0-rc6: i915 fails at
typec_displayport 5120x1440
Product: DRI
Version: XOrg git
Hardware: x86-64 (AMD64)
OS: Linux (All)
Status: NEW
Severity: not set
Priority: not set
Component: DRM/Intel
Assignee: intel-gfx-bugs at lists.freedesktop.org
Reporter: leho at kraav.com
QA Contact: intel-gfx-bugs at lists.freedesktop.org
CC: intel-gfx-bugs at lists.freedesktop.org
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 at 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 at 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 at 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
```
Looks like I'm not alone, either
https://www.reddit.com/r/linuxquestions/comments/cddpne/linux_and_ultrawide/
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