4

I have current Debian testing, can't set resolution for display dell U2718Q:

# inxi -Gxx Graphics: Card: Intel 2nd Generation Core Processor Family Integrated Graphics Controller bus-ID: 00:02.0 chip-ID: 8086:0116 Display Server: x11 (X.Org 1.19.5 ) drivers: intel Resolution: [email protected] OpenGl: renderer: Mesa DRI Intel Sandybridge Mobile version: 3.3 Mesa 17.2.5 (compat-v: 3.0) Direct Render: yes

/etc/X11/xorg.conf:

Section "Device" Indentifier "Intel Graphics" Driver "intel" Option "AccelMethod" "sna" Option "TearFree" "true" EndSection

But it didn't help with resolution.

I try to set:

# xrandr --output HDMI-1 --mode 3840x2160_60.00 xrandr: Configure crtc 0 failed

I tried also with option --crtc, but there is no result.

xrandr output:

# xrandr Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 8192 x 8192 LVDS-1 connected (normal left inverted right x axis y axis) 1366x768 60.10 + 1360x768 59.80 59.96 1024x768 60.04 60.00 960x720 60.00 928x696 60.05 896x672 60.01 960x600 60.00 960x540 59.99 800x600 60.00 60.32 56.25 840x525 60.01 59.88 800x512 60.17 700x525 59.98 640x512 60.02 720x450 59.89 640x480 60.00 59.94 680x384 59.80 59.96 576x432 60.06 512x384 60.00 400x300 60.32 56.34 320x240 60.05 VGA-1 disconnected (normal left inverted right x axis y axis) HDMI-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 609mm x 349mm 2048x1280 59.99 2048x1080 24.00 1920x1080 60.00* 60.00 50.00 59.94 30.00 25.00 24.00 29.97 23.98 1920x1080i 60.00 50.00 59.94 50.00 1600x1200 60.00 1600x900 60.00 1280x1024 75.02 60.02 1152x864 75.00 1280x720 60.00 50.00 59.94 1024x768 75.03 60.00 800x600 75.00 60.32 720x576 50.00 720x576i 50.00 720x480 60.00 59.94 720x480i 60.00 59.94 640x480 75.00 60.00 59.94 720x400 70.08 3840x2160_60.00 59.98 DP-1 disconnected (normal left inverted right x axis y axis)

I have xserver-xorg-video-intel, xserver-xorg-video-all, xserver-xorg-core packages installed.

Please any help.

Upd:

Processor: Intel Core i5-2467M CPU @ 1.60GHz x 2

port: HDMI 2.0

/var/log/Xorg.0.log

[    18.449] (II) LoadModule: "intel" [    18.456] (II) Loading /usr/lib/xorg/modules/drivers/intel_drv.so [    18.469] (II) Module intel: vendor="X.Org Foundation" [    18.469]    compiled for 1.19.0, module version = 2.99.917 [    18.469]    Module class: X.Org Video Driver [    18.469]    ABI class: X.Org Video Driver, version 23.0 [    18.469] (II) intel: Driver for Intel(R) Integrated Graphics Chipsets:         i810, i810-dc100, i810e, i815, i830M, 845G, 854, 852GM/855GM, 865G, 915G, E7221 (i915), 915GM, 945G, 945GM, 945GME, Pineview GM, Pineview G, 965G, G35, 965Q, 946GZ, 965GM, 965GME/GLE, G33, Q35, Q33, GM45, 4 Series, G45/G43, Q45/Q43, G41, B43 [    18.470] (II) intel: Driver for Intel(R) HD Graphics [    18.470] (II) intel: Driver for Intel(R) Iris(TM) Graphics [    18.470] (II) intel: Driver for Intel(R) Iris(TM) Pro Graphics [    18.490] (II) intel(0): Using Kernel Mode Setting driver: i915, version 1.6.0 20170403 [    18.490] (II) intel(0): SNA compiled: xserver-xorg-video-intel 2:2.99.917+git20161206-1 (Timo Aaltonen <[email protected]>) [    18.490] (II) intel(0): SNA compiled for use with valgrind [    18.494] (--) intel(0): Integrated Graphics Chipset: Intel(R) HD Graphics 3000
Improve this question
9
  • Which port are you using to connect your monitor? Commented Dec 13, 2017 at 16:56
  • 1
    What is the output of xrandr? Commented Dec 13, 2017 at 17:09
  • @StephenKitt HDMI Commented Dec 13, 2017 at 17:35
  • @IgnacioVazquez-Abrams posted in question. Commented Dec 13, 2017 at 17:35
  • What CPU do you have? Commented Dec 13, 2017 at 17:43

1 Answer 1

Reset to default
3

Sandy Bridge’s outputs don’t have enough bandwidth to support your monitor’s full resolution at 60Hz, however it should be possible to create a mode which will get you some of the way there.

This article gives details on the calculation process. In your case, the important factors are that your monitor’s native resolution is 3840×2160, and that HDMI 1.4 has a maximum pixel clock of 340MHz. Using umc, we can use this to determine an appropriate mode line:

$ umc 3840 2160 340000000 # 3840x2160x30.00 @ 65.994kHz Modeline "3840x2160x30.00" 340.000000 3840 4080 4496 5152 2160 2164 2168 2200 -HSync +VSync

To try this, run

xrandr --newmode "3840x2160x30.00" 340.000000 3840 4080 4496 5152 2160 2164 2168 2200 -HSync +VSync xrandr --addmode HDMI-1 "3840x2160x30.00" xrandr --output HDMI-1 --mode "3840x2160x30.00"

If it proves too high for the integrated GPU, or the monitor doesn’t like it, you can try reducing the pixel clock, or reducing the blanking timing (which should be fine on a modern screen):

$ umc 3840 2160 30 --rbt # 3840x2160x29.98 @ 65.688kHz Modeline "3840x2160x29.98" 262.750000 3840 3888 3920 4000 2160 2163 2167 2191 +HSync -VSync

Once you have a working mode line, you can store it permanently by adding a configuration file, say /etc/X11/xorg.conf.d/30-hdmi-4k.conf, containing:

Section "Monitor" Identifier "HDMI-1" ModelName "Your monitor" Modeline "3840x2160x29.98" 262.750000 3840 3888 3920 4000 2160 2163 2167 2191 +HSync -VSync EndSection
Improve this answer
2
  • Thank you for link, how can I calculate correct parameters? I have HDMI 2.0 and try: 3200x1600_30.00 - failed configure, 3200x1600_29.00 - display show error message, 2560x1440_60.00 - failed, 2560x1440_34.00 - display show error message. (display dell U2718Q) Commented Dec 14, 2017 at 15:05
  • Sandy Bridge only supports HDMI 1.4, regardless of the kind of cable you have (which doesn’t make any difference) or the level of support in your monitor. You probably need to look up supported frequencies in your monitor’s manual, the modes that display error messages on the monitor might well have frequencies that are too low. Commented Dec 14, 2017 at 16:28

You must log in to answer this question.

Start asking to get answers

Find the answer to your question by asking.

Ask question

Explore related questions

See similar questions with these tags.