<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] Glitches with HiDPI monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=103768#c4">Comment # 4</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [SKL] Glitches with HiDPI monitor" href="https://bugs.freedesktop.org/show_bug.cgi?id=103768">bug 103768</a> from <a class="email" href="mailto:pmenzel+bugs.freedesktop@molgen.mpg.de" title="Paul Menzel <pmenzel+bugs.freedesktop@molgen.mpg.de>"> Paul Menzel</a> <pre>Created <a href="attachment.cgi?id=135544" name="attach_135544" title="Linux 4.14 message with `drm.debug=0x1e log_buf_len=5M`">attachment 135544</a> <a href="attachment.cgi?id=135544&action=edit" title="Linux 4.14 message with `drm.debug=0x1e log_buf_len=5M`">[details]</a> Linux 4.14 message with `drm.debug=0x1e log_buf_len=5M` It’s not the cable. Testing a DP-to-DP cable shows the same problem. Please find the Linux messages attached. Here is also the verbose output of `xrandr`. ``` $ xrandr --verbose Screen 0: minimum 320 x 200, current 3840 x 2160, maximum 8192 x 8192 HDMI-1 disconnected primary (normal left inverted right x axis y axis) Identifier: 0x42 Timestamp: 22237 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: 22237 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: 22237 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 connected 3840x2160+0+0 (0x49) normal (normal left inverted right x axis y axis) 698mm x 392mm Identifier: 0x45 Timestamp: 22237 Subpixel: unknown Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones: HDMI-3 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: EDID: 00ffffffffffff0010ac934050313031 24180104b54627783a73e0a35336b626 0d5153a54b008100b300d100714fa940 8180d1c00101a36600a0f0701f803020 3500ba882100001a000000ff004b3352 3930343934313031500a000000fc0044 454c4c20555033323134510a000000fd 001d4b1f8c1e000a20202020202001d3 020315b1509005040302071601061112 1513141f2004740030f2705a80b0588a 00ba882100001e023a801871382d4058 2c2500ba882100001e565e00a0a0a029 5030203500ba882100001a011d007251 d01e206e285500ba882100001e8c0ad0 8a20e02d10103e9600ba882100001800 00000000000000000000000000000084 Broadcast RGB: Automatic supported: Automatic, Full, Limited 16:235 audio: auto supported: force-dvi, off, auto, on link-status: Good supported: Good, Bad 3840x2160 (0x49) 262.8MHz +HSync -VSync *current +preferred h: width 3840 start 3888 end 3920 total 4000 skew 0 clock 65.7KHz v: height 2160 start 2163 end 2168 total 2191 clock 30.0Hz 3840x2160 (0x4a) 297.0MHz +HSync +VSync h: width 3840 start 4016 end 4104 total 4400 skew 0 clock 67.5KHz v: height 2160 start 2168 end 2178 total 2250 clock 30.0Hz 3840x2160 (0x4b) 296.7MHz +HSync +VSync h: width 3840 start 4016 end 4104 total 4400 skew 0 clock 67.4KHz v: height 2160 start 2168 end 2178 total 2250 clock 30.0Hz 2560x1440 (0x4c) 241.5MHz +HSync -VSync h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 88.8KHz v: height 1440 start 1443 end 1448 total 1481 clock 60.0Hz 1920x1200 (0x4d) 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 (0x4e) 148.5MHz +HSync +VSync h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.5KHz v: height 1080 start 1082 end 1087 total 1125 clock 60.0Hz 1920x1080 (0x4f) 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 1920x1080 (0x50) 148.5MHz +HSync +VSync h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 56.2KHz v: height 1080 start 1084 end 1089 total 1125 clock 50.0Hz 1920x1080 (0x51) 148.4MHz +HSync +VSync h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 67.4KHz v: height 1080 start 1084 end 1089 total 1125 clock 59.9Hz 1920x1080i (0x52) 74.2MHz +HSync +VSync Interlace h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.8KHz v: height 1080 start 1084 end 1094 total 1125 clock 60.1Hz 1920x1080i (0x53) 74.2MHz +HSync +VSync Interlace h: width 1920 start 2448 end 2492 total 2640 skew 0 clock 28.1KHz v: height 1080 start 1084 end 1094 total 1125 clock 50.0Hz 1920x1080 (0x54) 74.2MHz +HSync +VSync h: width 1920 start 2558 end 2602 total 2750 skew 0 clock 27.0KHz v: height 1080 start 1084 end 1089 total 1125 clock 24.0Hz 1920x1080i (0x55) 74.2MHz +HSync +VSync Interlace h: width 1920 start 2008 end 2052 total 2200 skew 0 clock 33.7KHz v: height 1080 start 1084 end 1094 total 1125 clock 60.0Hz 1920x1080 (0x56) 74.2MHz +HSync +VSync h: width 1920 start 2558 end 2602 total 2750 skew 0 clock 27.0KHz v: height 1080 start 1084 end 1089 total 1125 clock 24.0Hz 1600x1200 (0x57) 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 (0x58) 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 (0x59) 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 (0x5a) 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 (0x5b) 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 (0x5c) 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 1280x720 (0x5d) 74.2MHz +HSync +VSync h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.0KHz v: height 720 start 725 end 730 total 750 clock 60.0Hz 1280x720 (0x5e) 74.2MHz +HSync +VSync h: width 1280 start 1720 end 1760 total 1980 skew 0 clock 37.5KHz v: height 720 start 725 end 730 total 750 clock 50.0Hz 1280x720 (0x5f) 74.2MHz +HSync +VSync h: width 1280 start 1390 end 1430 total 1650 skew 0 clock 45.0KHz v: height 720 start 725 end 730 total 750 clock 59.9Hz 1024x768 (0x60) 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 (0x61) 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 (0x62) 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 (0x63) 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 720x576 (0x64) 27.0MHz -HSync -VSync h: width 720 start 732 end 796 total 864 skew 0 clock 31.2KHz v: height 576 start 581 end 586 total 625 clock 50.0Hz 720x480 (0x65) 27.0MHz -HSync -VSync h: width 720 start 736 end 798 total 858 skew 0 clock 31.5KHz v: height 480 start 489 end 495 total 525 clock 60.0Hz 720x480 (0x66) 27.0MHz -HSync -VSync h: width 720 start 736 end 798 total 858 skew 0 clock 31.5KHz v: height 480 start 489 end 495 total 525 clock 59.9Hz 640x480 (0x67) 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 (0x68) 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 60.0Hz 640x480 (0x69) 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 (0x6a) 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 HDMI-3 disconnected (normal left inverted right x axis y axis) Identifier: 0x46 Timestamp: 22237 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: 22237 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 ```</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are the QA Contact for the bug.</li> <li>You are on the CC list for the bug.</li> </ul> </body> </html>