Ubuntu – Dell Inspiron 3593 shows display unclaimed for Intel Device 8a56 (rev 07)

I installed Ubuntu 18.04.3 LTS on a Dell Inspiron 3593 (with Intel graphics card), but when I run lshw it shows the display is unclaimed. Unfortunately Dell discontinued their graphics update tool, because apparently Linux Kernel should already have all the drivers necessary. But as you can see apparently, that's not the case with me.

In Gnome, when I go to Settings, Details, Graphics, it says: llvmpipe (LLVM 8.0, 256 bits).

Here are some outputs:

lshw

$ sudo lshw -c display
  *-display UNCLAIMED       
       description: VGA compatible controller
       product: Intel Corporation
       vendor: Intel Corporation
       physical id: 2
       bus info: pci@0000:00:02.0
       version: 07
       width: 64 bits
       clock: 33MHz
       capabilities: pciexpress msi pm vga_controller bus_master cap_list
       configuration: latency=0
       resources: memory:90000000-90ffffff memory:80000000-8fffffff ioport:4000(size=64) memory:c0000-dffff

lspci

$ sudo lspci -nv | sed -n '/VGA/,/^$/p'
00:02.0 0300: 8086:8a56 (rev 07) (prog-if 00 [VGA controller])
    Subsystem: 1028:0979
    Flags: bus master, fast devsel, latency 0, IRQ 255
    Memory at 90000000 (64-bit, non-prefetchable) [size=16M]
    Memory at 80000000 (64-bit, prefetchable) [size=256M]
    I/O ports at 4000 [size=64]
    [virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
    Capabilities: [40] Vendor Specific Information: Len=0c <?>
    Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
    Capabilities: [ac] MSI: Enable- Count=1/1 Maskable+ 64bit-
    Capabilities: [d0] Power Management version 2
    Capabilities: [100] Process Address Space ID (PASID)
    Capabilities: [200] Address Translation Service (ATS)
    Capabilities: [300] Page Request Interface (PRI)

All xorg video installs

$ dpkg --get-selections | grep xserver-xorg-video  
xserver-xorg-video-all-hwe-18.04        install
xserver-xorg-video-amdgpu-hwe-18.04     install
xserver-xorg-video-ati-hwe-18.04        install
xserver-xorg-video-fbdev-hwe-18.04      install
xserver-xorg-video-intel-hwe-18.04      install
xserver-xorg-video-nouveau-hwe-18.04    install
xserver-xorg-video-qxl-hwe-18.04        install
xserver-xorg-video-radeon-hwe-18.04     install
xserver-xorg-video-vesa-hwe-18.04       install
xserver-xorg-video-vmware-hwe-18.04     install

mesa installations

$ dpkg --get-selections | grep mesa
libegl-mesa0:amd64              install
libegl1-mesa:amd64              install
libgl1-mesa-dri:amd64               install
libgl1-mesa-glx:amd64               install
libglapi-mesa:amd64             install
libglu1-mesa:amd64              install
libglx-mesa0:amd64              install
libwayland-egl1-mesa:amd64          install
mesa-va-drivers:amd64               install
mesa-vdpau-drivers:amd64            install

libdrm installations

$ dpkg --get-selections | grep libdrm
libdrm-amdgpu1:amd64                install
libdrm-common                   install
libdrm-dev:amd64                install
libdrm-intel1:amd64             install
libdrm-nouveau2:amd64               install
libdrm-radeon1:amd64                install
libdrm2:amd64                   install

libva installations

$ dpkg --get-selections | grep libva
libva-drm2:amd64                install
libva-wayland2:amd64                install
libva-x11-2:amd64               install
libva2:amd64                    install

cairo

$ dpkg --get-selections | grep cairo
cairo-5c                    install
libcairo-5c0:amd64              install
libcairo-gobject-perl               install
libcairo-gobject2:amd64             install
libcairo-perl                   install
libcairo-script-interpreter2:amd64      install
libcairo2:amd64                 install
libcairo2-dev:amd64             install
libpangocairo-1.0-0:amd64           install
python3-cairo:amd64             install
python3-gi-cairo                install

intel installations

$ dpkg --get-selections | grep intel
intel-microcode                 install
libdrm-intel1:amd64             install
xserver-xorg-video-intel-hwe-18.04      install

i915 driver

$ lsmod | grep i915
i915                 1826816  0
drm_kms_helper        180224  1 i915
drm                   483328  2 drm_kms_helper,i915
i2c_algo_bit           16384  1 i915
video                  49152  3 dell_wmi,dell_laptop,i915

lspci and uname

$ lspci -k | grep -EA3 'VGA|3D|Display'; uname -a
00:02.0 VGA compatible controller: Intel Corporation Device 8a56 (rev 07)
    Subsystem: Dell Device 0979
00:04.0 Signal processing controller: Intel Corporation Device 8a03 (rev 03)
    Subsystem: Dell Device 0979
Linux MyPC 5.0.0-37-generic #40~18.04.1-Ubuntu SMP Thu Nov 14 12:06:39 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Any help would be highly appreciated.