[Intel-gfx] [Intel HD 4400] strongly irritating artefacts on 2560x1440 laptop display
Martin Wilck
mwilck at arcor.de
Tue Jan 27 13:49:43 PST 2015
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 at 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
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