Created attachment 114747 [details] dmesg with ASUS PA238Q that has bad output ==System Environment== -------------------------- HDMI monitor: ASUS PA238Q, ASUS VS239HR BIOS: V59 Regression: No. This is the first time to compare two monitors in detail Non-working platforms: BSW ==kernel== -------------------------- -testing: drm-intel-testing-2015-03-27 (fails) ==Bug detailed description== ----------------------------- When connected to HDMI monitor (and eDP diconnected) and run "testdisplay -a", ASUS VS239HR shows good but ASUS PA238Q shows bad. ==Reproduce steps== ---------------------------- 1. Disconnect eDP, Connect ASUS PA238Q with HDMI cable and boot 2. "testdisplay -a" shows fine on resolutions "1920x1080 60", 720x*, 640x*, but shows black on other resolutions. 3. Connect ASUS VS239HR with HDMI cable and boot 4. "testdisplay -a" shows fine on most resolutions. There is resolution "1680x1050 60" shows black, but it shows fine if I double check with "testdisplay -o" Below are details for step 2 and step 4. Step 2: Below is all resolutions on ASUS PA238Q, and only default mode id 0 and mode id > 30 shows fine. testdisplay shows black screen on mode id 1 - 30 CRTC(30):[0] 1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500 CRTC(30):[1] 1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x40 148352 CRTC(30):[2] 1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74250 CRTC(30):[3] 1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74176 CRTC(30):[4] 1920x1080 50 1920 2448 2492 2640 1080 1084 1089 1125 0x5 0x40 148500 CRTC(30):[5] 1920x1080i 50 1920 2448 2492 2640 1080 1084 1094 1125 0x15 0x40 74250 CRTC(30):[6] 1920x1080 30 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x40 74250 CRTC(30):[7] 1920x1080 30 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x40 74176 CRTC(30):[8] 1920x1080 25 1920 2448 2492 2640 1080 1084 1089 1125 0x5 0x40 74250 CRTC(30):[9] 1920x1080 24 1920 2558 2602 2750 1080 1084 1089 1125 0x5 0x40 74250 CRTC(30):[10] 1920x1080 24 1920 2558 2602 2750 1080 1084 1089 1125 0x5 0x40 74176 CRTC(30):[11] 1680x1050 60 1680 1728 1760 1840 1050 1053 1059 1080 0x9 0x40 119000 CRTC(30):[12] 1280x1024 75 1280 1296 1440 1688 1024 1025 1028 1066 0x5 0x40 135000 CRTC(30):[13] 1280x1024 60 1280 1328 1440 1688 1024 1025 1028 1066 0x5 0x40 108000 CRTC(30):[14] 1440x900 60 1440 1488 1520 1600 900 903 909 926 0x9 0x40 88750 CRTC(30):[15] 1280x960 60 1280 1376 1488 1800 960 961 964 1000 0x5 0x40 108000 CRTC(30):[16] 1152x864 75 1152 1216 1344 1600 864 865 868 900 0x5 0x40 108000 CRTC(30):[17] 1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74250 CRTC(30):[18] 1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74176 CRTC(30):[19] 1280x720 50 1280 1720 1760 1980 720 725 730 750 0x5 0x40 74250 CRTC(30):[20] 1440x576 50 1440 1464 1592 1728 576 581 586 625 0xa 0x40 54000 CRTC(30):[21] 1024x768 75 1024 1040 1136 1312 768 769 772 800 0x5 0x40 78800 CRTC(30):[22] 1024x768 70 1024 1048 1184 1328 768 771 777 806 0xa 0x40 75000 CRTC(30):[23] 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 CRTC(30):[24] 1440x480 60 1440 1472 1596 1716 480 489 495 525 0xa 0x40 54054 CRTC(30):[25] 1440x480 60 1440 1472 1596 1716 480 489 495 525 0xa 0x40 54000 CRTC(30):[26] 832x624 75 832 864 928 1152 624 625 628 667 0xa 0x40 57284 CRTC(30):[27] 800x600 75 800 816 896 1056 600 601 604 625 0x5 0x40 49500 CRTC(30):[28] 800x600 72 800 856 976 1040 600 637 643 666 0x5 0x40 50000 CRTC(30):[29] 800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000 CRTC(30):[30] 800x600 56 800 824 896 1024 600 601 603 625 0x5 0x40 36000 CRTC(30):[31] 720x576 50 720 732 796 864 576 581 586 625 0xa 0x40 27000 CRTC(30):[32] 720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27027 CRTC(30):[33] 720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27000 CRTC(30):[34] 640x480 75 640 656 720 840 480 481 484 500 0xa 0x40 31500 CRTC(30):[35] 640x480 67 640 704 768 864 480 483 486 525 0xa 0x40 30240 CRTC(30):[36] 640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25200 CRTC(30):[37] 640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25175 CRTC(30):[38] 720x400 70 720 738 846 900 400 412 414 449 0x6 0x40 28320 Step 4: Below is all resolutions on ASUS VS239HR, most resolutions are fine. The resolution "1680x1050 60" (id) shows black screen when running "testdisplay -a", but "testdisplay -o 41,6" shows fine: [0] 1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x48 148500 [1] 1920x1080 60 1920 2008 2052 2200 1080 1084 1089 1125 0x5 0x40 148352 [2] 1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74250 [3] 1920x1080i 60 1920 2008 2052 2200 1080 1084 1094 1125 0x15 0x40 74176 [4] 1920x1080 50 1920 2448 2492 2640 1080 1084 1089 1125 0x5 0x40 148500 [5] 1920x1080i 50 1920 2448 2492 2640 1080 1084 1094 1125 0x15 0x40 74250 [6] 1680x1050 60 1680 1728 1760 1840 1050 1053 1059 1080 0x9 0x40 119000 [7] 1280x1024 75 1280 1296 1440 1688 1024 1025 1028 1066 0x5 0x40 135000 [8] 1280x1024 60 1280 1328 1440 1688 1024 1025 1028 1066 0x5 0x40 108000 [9] 1440x900 60 1440 1488 1520 1600 900 903 909 926 0x9 0x40 88750 [10] 1280x960 60 1280 1376 1488 1800 960 961 964 1000 0x5 0x40 108000 [11] 1280x800 60 1280 1328 1360 1440 800 803 809 823 0x9 0x40 71000 [12] 1152x864 75 1152 1216 1344 1600 864 865 868 900 0x5 0x40 108000 [13] 1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74250 [14] 1280x720 60 1280 1390 1430 1650 720 725 730 750 0x5 0x40 74176 [15] 1280x720 50 1280 1720 1760 1980 720 725 730 750 0x5 0x40 74250 [16] 1440x576 50 1440 1464 1592 1728 576 581 586 625 0xa 0x40 54000 [17] 1024x768 75 1024 1040 1136 1312 768 769 772 800 0x5 0x40 78800 [18] 1024x768 70 1024 1048 1184 1328 768 771 777 806 0xa 0x40 75000 [19] 1024x768 60 1024 1048 1184 1344 768 771 777 806 0xa 0x40 65000 [20] 1440x480 60 1440 1472 1596 1716 480 489 495 525 0xa 0x40 54054 [21] 1440x480 60 1440 1472 1596 1716 480 489 495 525 0xa 0x40 54000 [22] 832x624 75 832 864 928 1152 624 625 628 667 0xa 0x40 57284 [23] 800x600 75 800 816 896 1056 600 601 604 625 0x5 0x40 49500 [24] 800x600 72 800 856 976 1040 600 637 643 666 0x5 0x40 50000 [25] 800x600 60 800 840 968 1056 600 601 605 628 0x5 0x40 40000 [26] 800x600 56 800 824 896 1024 600 601 603 625 0x5 0x40 36000 [27] 720x576 50 720 732 796 864 576 581 586 625 0xa 0x40 27000 [28] 720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27027 [29] 720x480 60 720 736 798 858 480 489 495 525 0xa 0x40 27000 [30] 640x480 75 640 656 720 840 480 481 484 500 0xa 0x40 31500 [31] 640x480 67 640 704 768 864 480 483 486 525 0xa 0x40 30240 [32] 640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25200 [33] 640x480 60 640 656 752 800 480 490 492 525 0xa 0x40 25175 [34] 720x400 70 720 738 846 900 400 412 414 449 0x6 0x40 28320
Created attachment 114748 [details] dmesg with ASUS VS239HR that has good output
exists on drm-intel-testing-2015-04-10
Exists on drm-intel-testing-2015-04-23
Exists on drm-intel-testing-2015-05-08
exists on drm-intel-testing-2015-05-22
Please try kernel v4.4.
The request to test with a newer kernel was made months ago, if there is no response within a month the bug will be closed
Timeout - assuming resolved+fixed.
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