Bug 54688

Summary:

[ilk] assert PCH dp disabled failed.

Product:

DRI

Reporter:

Chris Wilson <chris>

Component:

DRM/Intel

Assignee:

Daniel Vetter <daniel>

Status:

CLOSED FIXED

QA Contact:

Severity:

major

Priority:

medium

CC:

ben, chris, daniel, jbarnes

Version:

unspecified

Hardware:

Other

OS:

All

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
dmesg for dpms off and recovery	none

Description Chris Wilson 2012-09-09 11:27:33 UTC

[  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

Comment 1 Chris Wilson 2012-09-09 11:29:12 UTC

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.

Comment 2 Chris Wilson 2012-09-09 17:54:33 UTC

Created attachment 66887 [details]
dmesg for dpms off and recovery

Comment 3 Chris Wilson 2012-09-09 20:05:12 UTC

=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

Comment 4 Daniel Vetter 2012-09-11 15:25:34 UTC

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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