I've just installed a fresh Debian 9.4.0 on a PC with a PRIME Z370-A motherboard (Integrated Graphics Processor- Intel® HD Graphics) and an additional ZOTAC GeForce GTX 1070 graphics card. I'd like to use the GTX 1070 for computations. The monitor ProLite XUB2792QSU-B1 is connected to the Intel card via a HDMI cable.
Now, after I logged in to my user, the resolution was 1024x768 (instead of 2560x1440). These are the results of
xrandr: Failed to get size of gamma for output default Screen 0: minimum 1024 x 768, current 1024 x 768, maximum 1024 x 768 default connected primary 1024x768+0+0 0mm x 0mm 1024x768 76.00*
These are the currently available controllers:
lspci -k ... 00:02.0 VGA compatible controller: Intel Corporation Device 3e92 Subsystem: ASUSTeK Computer Inc. Device 8694 Kernel modules: i915 02:00.0 VGA compatible controller: NVIDIA Corporation GP104 [GeForce GTX 1070] (rev a1) Subsystem: ZOTAC International (MCO) Ltd. GP104 [GeForce GTX 1070] Kernel modules: nouveau
xrandr --listproviders command yields
Providers: number : 0
What should I do to be able to use my monitor at its full available resolution?