Public bug reported:

Hi! I have an HP ProBook 440 G7 with i7-10510U and INTEL UHD GRAPHICS.

The problem:

When i connect to my external monitor (a Samsung BX2250) via HDMI, the
screen is detected (i can see it in display settings) but the external
monitor remains black. Seams like a bad frequency or resolution. I tried
adding a new mode to xrandr with no luck. Also i tried different
versions of kernels from 5.4 to 5.9.

I am using Ubuntu 20.10

This is my lspci

0:00.0 Host bridge: Intel Corporation Device 9b61 (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation UHD Graphics (rev 02)
00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 
v5/6th Gen Core Processor Thermal Subsystem (rev 0c)
00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal 
Subsytem
00:14.0 USB controller: Intel Corporation Device 02ed
00:14.2 RAM memory: Intel Corporation Device 02ef
00:14.3 Network controller: Intel Corporation Wireless-AC 9462
00:14.5 SD Host controller: Intel Corporation Device 02f5
00:15.0 Serial bus controller [0c80]: Intel Corporation Serial IO I2C Host 
Controller
00:16.0 Communication controller: Intel Corporation Comet Lake Management 
Engine Interface
00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller
00:1d.0 PCI bridge: Intel Corporation Device 02b0 (rev f0)
00:1d.4 PCI bridge: Intel Corporation Device 02b4 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Device 0284
00:1f.3 Multimedia audio controller: Intel Corporation Device 02c8
00:1f.4 SMBus: Intel Corporation Device 02a3
00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake SPI (flash) 
Controller
01:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 
PCI Express Gigabit Ethernet Controller (rev 15)
02:00.0 Non-Volatile memory controller: Sandisk Corp Device 5009 (rev 01)

inxi -Gx output:

Graphics:  Device-1: Intel UHD Graphics vendor: Hewlett-Packard driver: i915 v: 
kernel bus ID: 00:02.0 
           Device-2: Lite-On HP HD Camera type: USB driver: uvcvideo bus ID: 
1-2:2 
           Display: x11 server: X.Org 1.20.9 driver: modesetting unloaded: 
fbdev,vesa resolution: 1366x768~60Hz 
           OpenGL: renderer: Mesa Intel UHD Graphics (CML GT2) v: 4.6 Mesa 
20.2.1 direct render: Yes 

xrandr output (with hdmi cable connected to external monitor):

Screen 0: minimum 320 x 200, current 1366 x 768, maximum 16384 x 16384
eDP-1 connected primary 1366x768+0+0 (normal left inverted right x axis y axis) 
309mm x 173mm
   1366x768      60.06*+  40.04  
   1360x768      59.80    59.96  
   1280x720      60.00    59.99    59.86    59.74  
   1024x768      60.04    60.00  
   960x720       60.00  
   928x696       60.05  
   896x672       60.01  
   1024x576      59.95    59.96    59.90    59.82  
   960x600       59.93    60.00  
   960x540       59.96    59.99    59.63    59.82  
   800x600       60.00    60.32    56.25  
   840x525       60.01    59.88  
   864x486       59.92    59.57  
   800x512       60.17  
   700x525       59.98  
   800x450       59.95    59.82  
   640x512       60.02  
   720x450       59.89  
   700x450       59.96    59.88  
   640x480       60.00    59.94  
   720x405       59.51    58.99  
   684x384       59.88    59.85  
   680x384       59.80    59.96  
   640x400       59.88    59.98  
   576x432       60.06  
   640x360       59.86    59.83    59.84    59.32  
   512x384       60.00  
   512x288       60.00    59.92  
   480x270       59.63    59.82  
   400x300       60.32    56.34  
   432x243       59.92    59.57  
   320x240       60.05  
   360x202       59.51    59.13  
   320x180       59.84    59.32  
HDMI-1 connected (normal left inverted right x axis y axis)
   1920x1080     60.00 +  50.00    59.94  
   1920x1080i    60.00    50.00    59.94  
   1600x1200     60.00  
   1680x1050     59.88  
   1280x1024     75.02    60.02  
   1440x900      74.98    59.90  
   1280x960      60.00  
   1280x800      59.91  
   1152x864      75.00  
   1280x720      60.00    50.00    59.94  
   1024x768      75.03    70.07    60.00  
   832x624       74.55  
   800x600       72.19    75.00    60.32    56.25  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       75.00    72.81    66.67    60.00    59.94  
   720x400       70.08  
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)

** Affects: xorg (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1907870

Title:
  Secondary screen detected but black screen with Intel UHD graphics on
  kernel 5.9

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1907870/+subscriptions

_______________________________________________
Mailing list: https://launchpad.net/~ubuntu-x-swat
Post to     : ubuntu-x-swat@lists.launchpad.net
Unsubscribe : https://launchpad.net/~ubuntu-x-swat
More help   : https://help.launchpad.net/ListHelp

Reply via email to