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I have a problem with display resolution on debian9.9.

I installed the lastest stable Debian with DVD1.iso 3 days ago, kernel 4.9.0, and I can't change the resolution of my Dell 2471h monitor. The default resolution is 1024x768 and I want 1920x1080.

I have tried xrandr way, following the answer of https://superuser.com/questions/716795/how-to-adjust-the-screen-resolution-in-debian by Bruno9779 .

Though I can see the 1920x1080 resolution option with command xrandr, but when I execute xrandr --output default --mode "1920x1080_60.00, it dosen't work, and show errors like

xrandr: Failed to get size of gamma for output default xrandr: Configure crtc 0 failed

I think there is something wrong with the graphic card driver

$lspci |grep -i vga

00:02.0 VGA compatible controller: Intel Corporation Device 3e92

please help.

  • You have a Coffee Lake system, you probably need a newer kernel and/or firmware — see the linked question for instructions. – Stephen Kitt Jun 21 '19 at 10:13
  • It worked for me, it bothered me for 2 days, thank you so much !@StephenKitt – richard_yang Jun 21 '19 at 12:17

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