[ 552.340627] WARNING: at drivers/gpu/drm/i915/intel_display.c:1450 assert_pch_dp_disabled+0x9b/0xc0() [ 552.340630] Hardware name: 514328U [ 552.340631] IBX PCH dp port still using transcoder B [ 552.340632] Modules linked in: cpufreq_powersave cpufreq_stats cpufreq_conservative cpufreq_userspace hid_lenovo_tpkbd nfs lockd sunrpc hid_apple usbhid hid psmouse ehci_hcd coretemp serio_raw pcspkr usbcore battery ac acpi_cpufreq mperf usb_common thermal evdev processor [ 552.340660] Pid: 2399, comm: Xorg Tainted: G W 3.6.0-rc3+ #21 [ 552.340662] Call Trace: [ 552.340667] [<ffffffff812d9f00>] ? intel_put_pch_pll.isra.26+0x50/0x50 [ 552.340673] [<ffffffff8103840f>] warn_slowpath_common+0x7f/0xc0 [ 552.340676] [<ffffffff81038506>] warn_slowpath_fmt+0x46/0x50 [ 552.340680] [<ffffffff812d9fbb>] assert_pch_dp_disabled+0x9b/0xc0 [ 552.340685] [<ffffffff812dcd4e>] ironlake_crtc_disable+0x1de/0x7d0 [ 552.340690] [<ffffffff810668d3>] ? __wake_up+0x53/0x70 [ 552.340695] [<ffffffff812e1fa7>] intel_crtc_update_dpms+0x77/0xb0 [ 552.340698] [<ffffffff812e209a>] intel_encoder_dpms+0x1a/0x30 [ 552.340702] [<ffffffff812e365c>] intel_connector_dpms+0x3c/0x70 [ 552.340709] [<ffffffff812ac7fd>] drm_mode_obj_set_property_ioctl+0x32d/0x340 [ 552.340713] [<ffffffff812ac840>] drm_mode_connector_property_set_ioctl+0x30/0x40 [ 552.340717] [<ffffffff8129af93>] drm_ioctl+0x473/0x540 [ 552.340721] [<ffffffff812ac810>] ? drm_mode_obj_set_property_ioctl+0x340/0x340 [ 552.340727] [<ffffffff81108b3c>] ? kfree+0x2c/0x150 [ 552.340733] [<ffffffff811306e9>] ? mntput_no_expire+0x49/0x160 [ 552.340737] [<ffffffff81130826>] ? mntput+0x26/0x40 [ 552.340742] [<ffffffff811247a7>] do_vfs_ioctl+0x97/0x530 [ 552.340747] [<ffffffff81113dae>] ? ____fput+0xe/0x10 [ 552.340753] [<ffffffff810582fc>] ? task_work_run+0x4c/0x90 [ 552.340757] [<ffffffff81124c8f>] sys_ioctl+0x4f/0x80 [ 552.340763] [<ffffffff814890d2>] system_call_fastpath+0x16/0x1b
Note that subsequently the dpms requires a pipe disable/enable to restore the display, or else it fails to train the link like bug 51493.
Created attachment 66887 [details] dmesg for dpms off and recovery
=0 ickle:~/git/linux (tmp)$ xrandr --verbose Screen 0: minimum 320 x 200, current 2560 x 1440, maximum 32767 x 32767 LVDS1 connected 1440x900+0+0 (0x45) normal (normal left inverted right x axis y axis) 261mm x 163mm Identifier: 0x41 Timestamp: 16169358 Subpixel: horizontal rgb Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones: CRTC: 0 CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: EDID: 00ffffffffffff0030ae144000000000 0b140103801a1078eae59593564f9028 28505400000001010101010101010101 010101010101f01ca0a050841a301810 360005a310000018f01ca0a050841a30 1810360005a3100000180000000f0095 0a32950a3219010030640055000000fe 004c5444313231455133420a202000b0 BACKLIGHT: 0 (0x00000000) range: (0,15) Backlight: 0 (0x00000000) range: (0,15) scaling mode: Full aspect supported: None Full Center Full aspect 1440x900 (0x45) 74.1MHz -HSync -VSync *current +preferred h: width 1440 start 1464 end 1480 total 1600 skew 0 clock 46.3KHz v: height 900 start 903 end 909 total 926 clock 50.0Hz 1360x768 (0x46) 84.8MHz -HSync +VSync h: width 1360 start 1432 end 1568 total 1776 skew 0 clock 47.7KHz v: height 768 start 771 end 781 total 798 clock 59.8Hz 1360x768 (0x47) 72.0MHz +HSync -VSync h: width 1360 start 1408 end 1440 total 1520 skew 0 clock 47.4KHz v: height 768 start 771 end 781 total 790 clock 60.0Hz 1152x864 (0x48) 81.6MHz -HSync +VSync h: width 1152 start 1216 end 1336 total 1520 skew 0 clock 53.7KHz v: height 864 start 865 end 868 total 895 clock 60.0Hz 1024x768 (0x49) 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 (0x4a) 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 800x600 (0x4b) 36.0MHz +HSync +VSync h: width 800 start 824 end 896 total 1024 skew 0 clock 35.2KHz v: height 600 start 601 end 603 total 625 clock 56.2Hz 640x480 (0x4c) 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 VGA1 disconnected (normal left inverted right x axis y axis) Identifier: 0x42 Timestamp: 16169358 Subpixel: unknown Clones: CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: HDMI1 disconnected (normal left inverted right x axis y axis) Identifier: 0x43 Timestamp: 16169358 Subpixel: unknown Clones: CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: Broadcast RGB: Full supported: Full Limited 16:2 audio: auto supported: force-dvi off auto on DP1 connected 2560x1440+0+0 (0x4d) normal (normal left inverted right x axis y axis) 597mm x 336mm Identifier: 0x44 Timestamp: 16169358 Subpixel: unknown Gamma: 1.0:1.0:1.0 Brightness: 1.0 Clones: CRTC: 1 CRTCs: 0 1 Transform: 1.000000 0.000000 0.000000 0.000000 1.000000 0.000000 0.000000 0.000000 1.000000 filter: EDID: 00ffffffffffff0010ac57a04c463031 17140104b53c22783a8e05ad4f33b026 0d5054a54b008100b300d100714fa940 818001010101565e00a0a0a029503020 350055502100001a000000ff00473630 36543035533130464c0a000000fc0044 454c4c2055323731310a2020000000fd 0031561d711e000a2020202020200180 02031df1509005040302071601061112 1513141f20230d7f07830f0000023a80 1871382d40582c250055502100001e01 1d8018711c1620582c25005550210000 9e011d007251d01e206e285500555021 00001e8c0ad08a20e02d10103e960055 50210000180000000000000000000000 0000000000000000000000000000004b Broadcast RGB: Full supported: Full Limited 16:2 audio: auto supported: force-dvi off auto on 2560x1440 (0x4d) 241.5MHz +HSync -VSync *current +preferred 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 1920x1440 (0x4e) 297.0MHz -HSync +VSync h: width 1920 start 2064 end 2288 total 2640 skew 0 clock 112.5KHz v: height 1440 start 1441 end 1444 total 1500 clock 75.0Hz 1920x1440 (0x4f) 234.0MHz -HSync +VSync h: width 1920 start 2048 end 2256 total 2600 skew 0 clock 90.0KHz v: height 1440 start 1441 end 1444 total 1500 clock 60.0Hz 1856x1392 (0x50) 288.0MHz -HSync +VSync h: width 1856 start 1984 end 2208 total 2560 skew 0 clock 112.5KHz v: height 1392 start 1395 end 1399 total 1500 clock 75.0Hz 1856x1392 (0x51) 218.2MHz -HSync +VSync h: width 1856 start 1952 end 2176 total 2528 skew 0 clock 86.3KHz v: height 1392 start 1393 end 1396 total 1439 clock 60.0Hz 1792x1344 (0x52) 261.0MHz -HSync +VSync h: width 1792 start 1888 end 2104 total 2456 skew 0 clock 106.3KHz v: height 1344 start 1345 end 1348 total 1417 clock 75.0Hz 1792x1344 (0x53) 204.8MHz -HSync +VSync h: width 1792 start 1920 end 2120 total 2448 skew 0 clock 83.6KHz v: height 1344 start 1345 end 1348 total 1394 clock 60.0Hz 2048x1152 (0x54) 198.0MHz -HSync +VSync h: width 2048 start 2184 end 2408 total 2768 skew 0 clock 71.5KHz v: height 1152 start 1153 end 1156 total 1192 clock 60.0Hz 1920x1200 (0x55) 281.2MHz -HSync +VSync h: width 1920 start 2064 end 2272 total 2624 skew 0 clock 107.2KHz v: height 1200 start 1203 end 1209 total 1262 clock 84.9Hz 1920x1200 (0x56) 245.2MHz -HSync +VSync h: width 1920 start 2056 end 2264 total 2608 skew 0 clock 94.0KHz v: height 1200 start 1203 end 1209 total 1255 clock 74.9Hz 1920x1200 (0x57) 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 (0x58) 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 (0x59) 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 (0x5a) 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 (0x5b) 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 1920x1080 (0x5c) 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 25.0Hz 1920x1080 (0x5d) 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 30.0Hz 1600x1200 (0x5e) 229.5MHz +HSync +VSync h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 106.2KHz v: height 1200 start 1201 end 1204 total 1250 clock 85.0Hz 1600x1200 (0x5f) 202.5MHz +HSync +VSync h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 93.8KHz v: height 1200 start 1201 end 1204 total 1250 clock 75.0Hz 1600x1200 (0x60) 189.0MHz +HSync +VSync h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 87.5KHz v: height 1200 start 1201 end 1204 total 1250 clock 70.0Hz 1600x1200 (0x61) 175.5MHz +HSync +VSync h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 81.2KHz v: height 1200 start 1201 end 1204 total 1250 clock 65.0Hz 1600x1200 (0x62) 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 (0x63) 214.8MHz -HSync +VSync h: width 1680 start 1808 end 1984 total 2288 skew 0 clock 93.9KHz v: height 1050 start 1053 end 1059 total 1105 clock 84.9Hz 1680x1050 (0x64) 187.0MHz -HSync +VSync h: width 1680 start 1800 end 1976 total 2272 skew 0 clock 82.3KHz v: height 1050 start 1053 end 1059 total 1099 clock 74.9Hz 1680x1050 (0x65) 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 1680x945 (0x66) 131.5MHz -HSync +VSync h: width 1680 start 1784 end 1960 total 2240 skew 0 clock 58.7KHz v: height 945 start 946 end 949 total 978 clock 60.0Hz 1400x1050 (0x67) 179.5MHz -HSync +VSync h: width 1400 start 1504 end 1656 total 1912 skew 0 clock 93.9KHz v: height 1050 start 1053 end 1057 total 1105 clock 85.0Hz 1400x1050 (0x68) 156.0MHz -HSync +VSync h: width 1400 start 1504 end 1648 total 1896 skew 0 clock 82.3KHz v: height 1050 start 1053 end 1057 total 1099 clock 74.9Hz 1400x1050 (0x69) 121.8MHz -HSync +VSync h: width 1400 start 1488 end 1632 total 1864 skew 0 clock 65.3KHz v: height 1050 start 1053 end 1057 total 1089 clock 60.0Hz 1600x900 (0x6a) 119.0MHz -HSync +VSync h: width 1600 start 1696 end 1864 total 2128 skew 0 clock 55.9KHz v: height 900 start 901 end 904 total 932 clock 60.0Hz 1280x1024 (0x6b) 157.5MHz +HSync +VSync h: width 1280 start 1344 end 1504 total 1728 skew 0 clock 91.1KHz v: height 1024 start 1025 end 1028 total 1072 clock 85.0Hz 1280x1024 (0x6c) 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 (0x6d) 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 1440x900 (0x6e) 157.0MHz -HSync +VSync h: width 1440 start 1544 end 1696 total 1952 skew 0 clock 80.4KHz v: height 900 start 903 end 909 total 948 clock 84.8Hz 1440x900 (0x6f) 136.8MHz -HSync +VSync h: width 1440 start 1536 end 1688 total 1936 skew 0 clock 70.6KHz v: height 900 start 903 end 909 total 942 clock 75.0Hz 1440x900 (0x70) 106.5MHz -HSync +VSync h: width 1440 start 1520 end 1672 total 1904 skew 0 clock 55.9KHz v: height 900 start 903 end 909 total 934 clock 59.9Hz 1280x960 (0x71) 148.5MHz +HSync +VSync h: width 1280 start 1344 end 1504 total 1728 skew 0 clock 85.9KHz v: height 960 start 961 end 964 total 1011 clock 85.0Hz 1280x960 (0x72) 108.0MHz +HSync +VSync h: width 1280 start 1376 end 1488 total 1800 skew 0 clock 60.0KHz v: height 960 start 961 end 964 total 1000 clock 60.0Hz 1366x768 (0x73) 85.9MHz -HSync +VSync h: width 1366 start 1439 end 1583 total 1800 skew 0 clock 47.7KHz v: height 768 start 769 end 772 total 795 clock 60.0Hz 1360x768 (0x74) 85.5MHz +HSync +VSync h: width 1360 start 1424 end 1536 total 1792 skew 0 clock 47.7KHz v: height 768 start 771 end 777 total 795 clock 60.0Hz 1280x800 (0x75) 122.5MHz -HSync +VSync h: width 1280 start 1360 end 1496 total 1712 skew 0 clock 71.6KHz v: height 800 start 803 end 809 total 843 clock 84.9Hz 1280x800 (0x76) 106.5MHz -HSync +VSync h: width 1280 start 1360 end 1488 total 1696 skew 0 clock 62.8KHz v: height 800 start 803 end 809 total 838 clock 74.9Hz 1280x800 (0x77) 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 (0x78) 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 1280x768 (0x79) 117.5MHz -HSync +VSync h: width 1280 start 1360 end 1496 total 1712 skew 0 clock 68.6KHz v: height 768 start 771 end 778 total 809 clock 84.8Hz 1280x768 (0x7a) 102.2MHz +HSync -VSync h: width 1280 start 1360 end 1488 total 1696 skew 0 clock 60.3KHz v: height 768 start 771 end 778 total 805 clock 74.9Hz 1280x768 (0x7b) 79.5MHz -HSync +VSync h: width 1280 start 1344 end 1472 total 1664 skew 0 clock 47.8KHz v: height 768 start 771 end 778 total 798 clock 59.9Hz 1280x720 (0x7c) 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 (0x7d) 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 1024x768 (0x7e) 94.5MHz +HSync +VSync h: width 1024 start 1072 end 1168 total 1376 skew 0 clock 68.7KHz v: height 768 start 769 end 772 total 808 clock 85.0Hz 1024x768 (0x7f) 78.8MHz +HSync +VSync h: width 1024 start 1040 end 1136 total 1312 skew 0 clock 60.1KHz v: height 768 start 769 end 772 total 800 clock 75.1Hz 1024x768 (0x80) 75.0MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1328 skew 0 clock 56.5KHz v: height 768 start 771 end 777 total 806 clock 70.1Hz 1024x768 (0x49) 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 1024x768 (0x81) 44.9MHz +HSync +VSync Interlace h: width 1024 start 1032 end 1208 total 1264 skew 0 clock 35.5KHz v: height 768 start 768 end 772 total 817 clock 43.5Hz 1024x576 (0x82) 47.0MHz -HSync +VSync h: width 1024 start 1064 end 1168 total 1312 skew 0 clock 35.8KHz v: height 576 start 577 end 580 total 597 clock 60.0Hz 800x600 (0x83) 56.2MHz +HSync +VSync h: width 800 start 832 end 896 total 1048 skew 0 clock 53.7KHz v: height 600 start 601 end 604 total 631 clock 85.1Hz 800x600 (0x84) 50.0MHz +HSync +VSync h: width 800 start 856 end 976 total 1040 skew 0 clock 48.1KHz v: height 600 start 637 end 643 total 666 clock 72.2Hz 800x600 (0x85) 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 (0x4a) 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 800x600 (0x4b) 36.0MHz +HSync +VSync h: width 800 start 824 end 896 total 1024 skew 0 clock 35.2KHz v: height 600 start 601 end 603 total 625 clock 56.2Hz 720x576 (0x86) 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 848x480 (0x87) 33.8MHz +HSync +VSync h: width 848 start 864 end 976 total 1088 skew 0 clock 31.0KHz v: height 480 start 486 end 494 total 517 clock 60.0Hz 720x480 (0x88) 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 (0x89) 36.0MHz -HSync -VSync h: width 640 start 696 end 752 total 832 skew 0 clock 43.3KHz v: height 480 start 481 end 484 total 509 clock 85.0Hz 640x480 (0x8a) 31.5MHz -HSync -VSync h: width 640 start 664 end 704 total 832 skew 0 clock 37.9KHz v: height 480 start 489 end 492 total 520 clock 72.8Hz 640x480 (0x8b) 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 (0x8c) 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 (0x4c) 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 (0x8d) 35.5MHz -HSync +VSync h: width 720 start 756 end 828 total 936 skew 0 clock 37.9KHz v: height 400 start 401 end 404 total 446 clock 85.0Hz 720x400 (0x8e) 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 640x400 (0x8f) 31.5MHz -HSync +VSync h: width 640 start 672 end 736 total 832 skew 0 clock 37.9KHz v: height 400 start 401 end 404 total 445 clock 85.1Hz 640x350 (0x90) 31.5MHz +HSync -VSync h: width 640 start 672 end 736 total 832 skew 0 clock 37.9KHz v: height 350 start 382 end 385 total 445 clock 85.1Hz
Fix for the transcoder B WARN applied to -fixes: commit 75c5da279e06577190abba52cabf0dc2a56edb97 Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Mon Sep 10 21:58:29 2012 +0200 drm/i915: fix up the IBX transcoder B check dp dpms on ilk/gm45 is still fail :(
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