Unscharfes Bild durch HTDMI Fedora 25

Ich habe einen Fedora 25 Mate-Desktop und einen ATI / AMD-Treiber auf meinem Laptop. Ich habe einen externen Monitor mit einer Auflösung von 1920x1080. Auf meinem externen Monitor habe ich eine schlechte Pixelauflösung. Wie man es repariert?

Anzeige xrandr:

Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384 eDP connected (normal left inverted right x axis y axis) 1920x1080 60.01 + 40.00  1680x1050 60.00  1400x1050 60.00  1280x1024 59.95  1440x900 59.99  1280x960 59.99  1280x854 59.95  1280x800 59.96  1280x720 59.97  1152x768 59.95  1024x768 59.95  800x600 59.96  848x480 59.94  720x480 59.94  640x480 59.94  HDMI-A-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 598mm x 336mm 1920x1080 60.00*+ 60.01 50.00 59.94  1920x1080i 60.00 50.00 59.94  1680x1050 59.88  1600x900 60.00  1280x1024 75.02 60.02  1280x800 59.91  1152x864 75.00  1280x720 60.00 50.00 59.94  1024x768 75.03 60.00  832x624 74.55  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  DisplayPort-0 disconnected (normal left inverted right x axis y axis) 

Und

 lspci | grep VGA -A 12  00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Device 98e4 (rev ea) 00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Device 15b3 00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 157b 00:02.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 157c 00:02.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 157c 00:02.4 PCI bridge: Advanced Micro Devices, Inc. [AMD] Device 157c 00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 157b 00:08.0 Encryption controller: Advanced Micro Devices, Inc. [AMD] Device 1578 00:09.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Device 157d 00:09.2 Audio device: Advanced Micro Devices, Inc. [AMD] Device 157a 00:10.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB XHCI Controller (rev 20) 00:11.0 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 4b) 00:12.0 USB controller: Advanced Micro Devices, Inc. [AMD] FCH USB EHCI Controller (rev 49) 

Mein Monitor ist BenQ EW2750ZL und der Laptop ist HP 255 G6 2HG34ES.