[Bug 103768] [SKL] Glitches with HiDPI monitor
bugzilla-daemon at freedesktop.org
bugzilla-daemon at freedesktop.org
Fri Nov 17 11:04:41 UTC 2017
https://bugs.freedesktop.org/show_bug.cgi?id=103768
Paul Menzel <pmenzel+bugs.freedesktop at molgen.mpg.de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |pmenzel+bugs.freedesktop at mo
| |lgen.mpg.de
--- Comment #6 from Paul Menzel <pmenzel+bugs.freedesktop at molgen.mpg.de> ---
Created attachment 135545
--> https://bugs.freedesktop.org/attachment.cgi?id=135545&action=edit
Linux 4.14 message with `drm.debug=0x1e log_buf_len=5M` (DP 1.2 in monitor
enabled)
Ok, Aaron’s answer in the thread *Can't enable 60hz with display (Dell
UP2414Q)* for Nvidia gave the right clue.
> You have to drive the monitor in MST mode to get 60 Hz.
It turns out, that DP 1.2 was disabled in the monitor menu. Now, 60 Hz are
detected.
Unfortunately, with GDM and Xfce 4.12, I have the same problem, that this is
treated as two monitors.
```
$ xrandr
[…]
DP-2-8 connected 1920x2160+1920+0 (normal left inverted right x axis y axis)
698mm x 392mm
1920x2160 60.0*+
DP-2-9 connected 1920x2160+0+0 (normal left inverted right x axis y axis) 698mm
x 392mm
1920x2160 60.0*+
1920x1200 59.9
1920x1080 60.0
1600x1200 60.0
1680x1050 60.0
1280x1024 75.0 60.0
1280x800 59.8
1152x864 75.0
1024x768 75.0 60.0
800x600 75.0 60.3
640x480 75.0 59.9
720x400 70.1
```
Aaron also answered that in the forum thread [1].
> Tiled displays are a problem for RandR. I started a thread with the X.Org
> community about how we want to deal with them. Due to how the RandR protocol
> is designed, it's impossible to cleanly represent these things in a way that
> won't confuse at least some applications.
>
> http://marc.info/?l=freedesktop-xorg-devel&m=138989953919169&w=2
[1]
https://devtalk.nvidia.com/default/topic/681356/linux/can-t-enable-60hz-with-display-dell-up2414q-/
```
$ xrandr --verbose
Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192
HDMI-1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x42
Timestamp: 22095
Subpixel: unknown
Clones:
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
DP-1 disconnected (normal left inverted right x axis y axis)
Identifier: 0x43
Timestamp: 22095
Subpixel: unknown
Clones: HDMI-2
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
HDMI-2 disconnected (normal left inverted right x axis y axis)
Identifier: 0x44
Timestamp: 22095
Subpixel: unknown
Clones: DP-1
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
DP-2 disconnected (normal left inverted right x axis y axis)
Identifier: 0x45
Timestamp: 22095
Subpixel: unknown
Clones: HDMI-3
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
HDMI-3 disconnected (normal left inverted right x axis y axis)
Identifier: 0x46
Timestamp: 22095
Subpixel: unknown
Clones: DP-2
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
aspect ratio: Automatic
supported: Automatic, 4:3, 16:9
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
DP-3 disconnected (normal left inverted right x axis y axis)
Identifier: 0x47
Timestamp: 22095
Subpixel: unknown
Clones:
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
Broadcast RGB: Automatic
supported: Automatic, Full, Limited 16:235
audio: auto
supported: force-dvi, off, auto, on
link-status: Good
supported: Good, Bad
DP-2-8 connected 1920x2160+1920+0 (0x4b) normal (normal left inverted right x
axis y axis) 698mm x 392mm
Identifier: 0x48
Timestamp: 22095
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 0
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
TILE: 1 0 1 0 2 0 1 0
EDID:
00ffffffffffff0010ac934050313031
24180104b54627783a73e0a35336b626
0d515300000001010101010101010101
0101010101014d6c80a070703e803020
3a00ba882100001a000000ff004b3352
3930343934313031500a000000fc0044
454c4c20555033323134510a000000fd
001d4b1f8c1e000a2020202020200121
7012790000120016821010007f076f08
000000000044454c9340503130310000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000002490
link-status: Good
supported: Good, Bad
1920x2160 (0x4b) 277.2MHz +HSync -VSync *current +preferred
h: width 1920 start 1968 end 2000 total 2080 skew 0 clock 133.3KHz
v: height 2160 start 2163 end 2173 total 2222 clock 60.0Hz
DP-2-9 connected 1920x2160+0+0 (0x4b) normal (normal left inverted right x axis
y axis) 698mm x 392mm
Identifier: 0x49
Timestamp: 22095
Subpixel: unknown
Gamma: 1.0:1.0:1.0
Brightness: 1.0
Clones:
CRTC: 1
CRTCs: 0 1 2
Transform: 1.000000 0.000000 0.000000
0.000000 1.000000 0.000000
0.000000 0.000000 1.000000
filter:
TILE: 1 0 1 0 2 0 1 0
EDID:
00ffffffffffff0010ac934050313031
24180104b54627783a73e0a35336b626
0d5153a54b008100b300d100714fa940
8180d1c001014d6c80a070703e803020
3a00ba882100001a000000ff004b3352
3930343934313031500a000000fc0044
454c4c20555033323134510a000000fd
001d4b1f8c1e000a20202020202001ff
7012790000120016821000007f076f08
000000000044454c9340503130310000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000000000
00000000000000000000000000003490
link-status: Good
supported: Good, Bad
1920x2160 (0x4b) 277.2MHz +HSync -VSync *current +preferred
h: width 1920 start 1968 end 2000 total 2080 skew 0 clock 133.3KHz
v: height 2160 start 2163 end 2173 total 2222 clock 60.0Hz
1920x1200 (0x4c) 193.2MHz -HSync +VSync
h: width 1920 start 2056 end 2256 total 2592 skew 0 clock 74.6KHz
v: height 1200 start 1203 end 1209 total 1245 clock 59.9Hz
1920x1080 (0x4d) 148.5MHz -HSync -VSync
h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.5KHz
v: height 1080 start 1084 end 1089 total 1125 clock 60.0Hz
1600x1200 (0x4e) 162.0MHz +HSync +VSync
h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 75.0KHz
v: height 1200 start 1201 end 1204 total 1250 clock 60.0Hz
1680x1050 (0x4f) 146.2MHz -HSync +VSync
h: width 1680 start 1784 end 1960 total 2240 skew 0 clock 65.3KHz
v: height 1050 start 1053 end 1059 total 1089 clock 60.0Hz
1280x1024 (0x50) 135.0MHz +HSync +VSync
h: width 1280 start 1296 end 1440 total 1688 skew 0 clock 80.0KHz
v: height 1024 start 1025 end 1028 total 1066 clock 75.0Hz
1280x1024 (0x51) 108.0MHz +HSync +VSync
h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 64.0KHz
v: height 1024 start 1025 end 1028 total 1066 clock 60.0Hz
1280x800 (0x52) 83.5MHz -HSync +VSync
h: width 1280 start 1352 end 1480 total 1680 skew 0 clock 49.7KHz
v: height 800 start 803 end 809 total 831 clock 59.8Hz
1152x864 (0x53) 108.0MHz +HSync +VSync
h: width 1152 start 1216 end 1344 total 1600 skew 0 clock 67.5KHz
v: height 864 start 865 end 868 total 900 clock 75.0Hz
1024x768 (0x54) 78.8MHz +HSync +VSync
h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.0KHz
v: height 768 start 769 end 772 total 800 clock 75.0Hz
1024x768 (0x55) 65.0MHz -HSync -VSync
h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.4KHz
v: height 768 start 771 end 777 total 806 clock 60.0Hz
800x600 (0x56) 49.5MHz +HSync +VSync
h: width 800 start 816 end 896 total 1056 skew 0 clock 46.9KHz
v: height 600 start 601 end 604 total 625 clock 75.0Hz
800x600 (0x57) 40.0MHz +HSync +VSync
h: width 800 start 840 end 968 total 1056 skew 0 clock 37.9KHz
v: height 600 start 601 end 605 total 628 clock 60.3Hz
640x480 (0x58) 31.5MHz -HSync -VSync
h: width 640 start 656 end 720 total 840 skew 0 clock 37.5KHz
v: height 480 start 481 end 484 total 500 clock 75.0Hz
640x480 (0x59) 25.2MHz -HSync -VSync
h: width 640 start 656 end 752 total 800 skew 0 clock 31.5KHz
v: height 480 start 490 end 492 total 525 clock 59.9Hz
720x400 (0x5a) 28.3MHz -HSync +VSync
h: width 720 start 738 end 846 total 900 skew 0 clock 31.5KHz
v: height 400 start 412 end 414 total 449 clock 70.1Hz
```
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