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How to enable dual display (laptop display + external monitor) on fedora28 with Lenova machine

asked 2018-08-28 17:02:49 -0500

olinart gravatar image

updated 2018-08-29 02:18:14 -0500

abadrinath gravatar image

On my older Fedora systems (using a Dell laptop) plugging the external monitor to the HDMI input was sufficient; Both monitors appeared in settings/display and I could adjust resolution etc. On my new laptop I see a single unknown monitor (the laptop display) whether or not the external monitor is plugged in. The Fn F7 key does nothing, and xrandr only shows the single monitor:

*xrandr --listmonitors
xrandr: Failed to get size of gamma for output default
Monitors: 1
 0: +*default 1920/508x1080/286+0+0  default*

The BIOS offers the ability to set either the laptop display or external display as the boot option ie where the username and password appear. With the BIOS set to external and the external monitor connected to the HDMI port, I do indeed see my display on the external monitor. The laptop display is dark, and xrandr and the Settings/display page shows a single monitor as before. Is there a better driver available for Intel UHD Graphics 620 card, or a way to manually set the X11 config file?

Machine components:
  Host: lenolin-triumf-ca Kernel: 4.17.17-200.fc28.x86_64 x86_64 bits: 64 
  compiler: gcc v: 8.1.1 Desktop: Gnome 3.28.3 
  Distro: Fedora release 28 (Twenty Eight) 
  Type: Laptop System: LENOVO product: 20L50011US v: ThinkPad T480 
  serial: <filter> 
  Mobo: LENOVO model: 20L50011US v: SDK0J40697 WIN serial: <filter> 
  UEFI: LENOVO v: N24ET41W (1.16 ) date: 07/18/2018 
  ID-1: BAT0 charge: 22.7 Wh condition: 23.9/23.9 Wh (100%) 
  model: LGC 01AV489 status: Unknown 
  ID-2: BAT1 charge: 21.3 Wh condition: 23.9/23.9 Wh (100%) 
  model: LGC 01AV490 status: Discharging 
  Array-1: capacity: 32 GiB slots: 2 EC: None max module size: 16 GiB 
  note: est. 
  Device-1: ChannelA-DIMM0 size: 8 GiB speed: 2400 MT/s type: DDR4 
  Device-2: ChannelB-DIMM0 size: No Module Installed 
  Topology: Quad Core model: Intel Core i5-8350U bits: 64 type: MT MCP 
  arch: Kaby Lake rev: A L2 cache: 6144 KiB 
  flags: lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 30336 
  Speed: 753 MHz min/max: 400/3600 MHz Core speeds (MHz): 1: 740 2: 733 
  3: 744 4: 743 5: 744 6: 782 7: 775 8: 763 
  Card-1: Intel UHD Graphics 620 driver: N/A bus ID: 00:02.0 
  Display: x11 server: Fedora Project 1.19.6 driver: fbdev 
  unloaded: modesetting,vesa resolution: 1920x1080~77Hz 
  OpenGL: renderer: llvmpipe (LLVM 6.0 256 bits) v: 3.3 Mesa 18.0.5 
  direct render: Yes 
  Card-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel v: kernel 
  bus ID: 00:1f.3 
  Sound Server: ALSA v: k4.17.17-200.fc28.x86_64 
  Card-1: Intel Ethernet I219-LM driver: e1000e v: 3.2.6-k port: N/A 
  bus ID: 00:1f.6 
  IF: enp0s31f6 state: up speed: 1000 Mbps duplex: full mac: <filter> 
  Card-2: Intel Wireless 8265 / 8275 driver: iwlwifi v: kernel bus ID: 03:00 
  IF: wlp3s0 state: up mac: <filter> 
  Card-3: IMC Networks Integrated ...
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I found a post on Intel graphics suggesting that having nomodeset in the grub config (/etc/defaults/grub) was the culprit. It was present in the grub file. Tried removing nomodeset with no change, unfortunately.

olinart gravatar imageolinart ( 2018-08-29 12:07:08 -0500 )edit

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answered 2019-02-04 06:20:49 -0500

Geeksquad9333 gravatar image

I've also followed your tips on generation on dual screen. It really helped me. In case of any tech help contact geek squad support.

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answered 2018-09-01 14:45:22 -0500

olinart gravatar image

My problem seems to be a flawed live-cd iso. I made my iso to a usb stick with mediawriter on a fedora26 system on Aug23 and it passed the security checks. I tested it and installed it on my hard drive. In checking the live cd again it was clear that it did not detect my laptop display, listing it as unknown.

I borrowed a fed28 live cd usb stick made a few months ago from a colleague, and found immediately that the laptop display was recognized. This was confirmed with xrandr.

I reinstalled my system from my colleague's stick and the monitors are working fine. This also fixed failures I had experienced with the suspend function.
This needs to be reported as an installation bug.

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answered 2018-09-07 12:07:22 -0500

olinart gravatar image

I made another live-cd for fedora28 (gnome spin) and the monitor problem reported earlier did not appear. So it appears that my problem was with the original downloaded iso even though it had passed the quality checks. If you encounter problems like this it is worth redoing the download.

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Asked: 2018-08-28 17:02:49 -0500

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Last updated: Feb 04 '19