Dear list members, I suffer from highly disturbing artefacts with the Intel HD 4400 chip set on thw 2560x1440 display (Sharp LQ133T1JW19) of my Fujitsu Lifebook S904. The effects are hard to describe, therefore I have uploaded a video to https://www.dropbox.com/sh/9wh0nzvp0w1phxz/AAAsvAqHN8ApXzor58FmGbwLa?dl=0. I can distinguish 2 effects that are possibly related to each other: 1. Maximized windows under GNOME3 (fully maximized or half-maximized on the right edge of the screen) fill the screen vertically with a single color (usually grey). Half-maximzed windows on the left edge are not affected. The effect is only seen if the Laptop screen is the main monitor in GNOME (showing the panel on top). Some applications, which start in maximized mode and can't be resized, are unusable on this screen. 2. Artefacts appear when windows are placed on the right and bottom areas of the screen. The artefacts look as if pixels extend vertically from their horizontal position to the bottom edge of the screen (resulting in vertical lines). The strength of the effect depends on the content of the windows that are visible. The effect "extends" from the window causing it to other windows and the background. The effect is not seen in screenshots (screenshot looks fine although the screen was unreadable at the time I took it). 1.) is observed only under GNOME, but I see 2.) on KDE and LXDE, too. I also tried various distributions. Most of my experiments have been done on OpenSUSE 13.2, kernel-vanilla-3.19.rc5, xorg 7.6_1.16.1-5.1, intel 2.99.916, libdrm_intel1-2.4.58-1.1, Mesa 10.3.0-91.3.2. But I see the artefacts also on Fedora 21 and Ubuntu 14.04. As a matter of fact, I tried the modesetting driver and even fbdev and observed similar effects, too. Thus i915 may actually not be the culprit here, but could I figure no other place to ask for help than this mailing list. I have also experimented with resolutions and refresh rates. Only at 1024x768 and lower I was unable to reproduce the problem. Any help would be highly appreciated. I am highly willing to do any testing and/or debugging that may be necessary to find the problem. Best regards Martin martin@artemis:~> xrandr --verbose Screen 0: minimum 8 x 8, current 2560 x 1440, maximum 32767 x 32767 eDP1 connected primary 2560x1440+0+0 (0x49) normal (normal left inverted right x axis y axis) 294mm x 165mm Identifier: 0x43 Timestamp: 19447 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: _MUTTER_PRESENTATION_OUTPUT: 0 EDID: 00ffffffffffff004d10121400000000 24170104a51d1178068800a4564d9a26 0d505400000001010101010101010101 010101010101735f00a0a0a03a503020 e50026a510000018454c00a0a0a03a50 3020e50026a510000018aa3f00a0a0a0 3a503020e50026a510000018000000fc 004c5131333354314a5731390a2000b6 BACKLIGHT: 892 range: (0, 892) Backlight: 892 range: (0, 892) scaling mode: Full aspect supported: None, Full, Center, Full aspect Broadcast RGB: Automatic supported: Automatic, Full, Limited 16:235 audio: auto supported: force-dvi, off, auto, on 2560x1440 (0x49) 244.350MHz -HSync -VSync *current +preferred h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 89.83KHz v: height 1440 start 1454 end 1459 total 1498 clock 59.97Hz 2560x1440 (0xae) 195.250MHz -HSync -VSync h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 71.78KHz v: height 1440 start 1454 end 1459 total 1498 clock 47.92Hz 2560x1440 (0xaf) 162.980MHz -HSync -VSync h: width 2560 start 2608 end 2640 total 2720 skew 0 clock 59.92KHz v: height 1440 start 1454 end 1459 total 1498 clock 40.00Hz 1920x1440 (0xb0) 234.000MHz -HSync +VSync h: width 1920 start 2048 end 2256 total 2600 skew 0 clock 90.00KHz v: height 1440 start 1441 end 1444 total 1500 clock 60.00Hz 1856x1392 (0xb1) 218.300MHz -HSync +VSync h: width 1856 start 1952 end 2176 total 2528 skew 0 clock 86.35KHz v: height 1392 start 1393 end 1396 total 1439 clock 60.01Hz 1792x1344 (0xb2) 204.800MHz -HSync +VSync h: width 1792 start 1920 end 2120 total 2448 skew 0 clock 83.66KHz v: height 1344 start 1345 end 1348 total 1394 clock 60.01Hz 1600x1200 (0xb3) 162.000MHz +HSync +VSync h: width 1600 start 1664 end 1856 total 2160 skew 0 clock 75.00KHz v: height 1200 start 1201 end 1204 total 1250 clock 60.00Hz 1400x1050 (0xb4) 122.000MHz +HSync +VSync h: width 1400 start 1488 end 1640 total 1880 skew 0 clock 64.89KHz v: height 1050 start 1052 end 1064 total 1082 clock 59.98Hz 1280x1024 (0xb5) 108.000MHz +HSync +VSync h: width 1280 start 1328 end 1440 total 1688 skew 0 clock 63.98KHz v: height 1024 start 1025 end 1028 total 1066 clock 60.02Hz 1280x960 (0xb6) 108.000MHz +HSync +VSync h: width 1280 start 1376 end 1488 total 1800 skew 0 clock 60.00KHz v: height 960 start 961 end 964 total 1000 clock 60.00Hz 1024x768 (0xb7) 65.000MHz -HSync -VSync h: width 1024 start 1048 end 1184 total 1344 skew 0 clock 48.36KHz v: height 768 start 771 end 777 total 806 clock 60.00Hz 800x600 (0xb8) 40.000MHz +HSync +VSync h: width 800 start 840 end 968 total 1056 skew 0 clock 37.88KHz v: height 600 start 601 end 605 total 628 clock 60.32Hz 800x600 (0xb9) 36.000MHz +HSync +VSync h: width 800 start 824 end 896 total 1024 skew 0 clock 35.16KHz v: height 600 start 601 end 603 total 625 clock 56.25Hz 640x480 (0xba) 25.175MHz -HSync -VSync h: width 640 start 656 end 752 total 800 skew 0 clock 31.47KHz v: height 480 start 490 end 492 total 525 clock 59.94Hz _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
