Blank screen after login following fedora 26 update

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I have just upgraded my desktop from fedora 25 to the recently released fedora 26. However following login which appears successful there is just a blank screen with a cursor in the middle that does not respond to the mouse.

I can boot with runlevel 3 into the terminal and my files are there. But I cannot boot normally into the Gnome desktop. Can anyone help with this? What information can I provide which might help to solve the problem?

Output of lspci

00:00.0 Host bridge: Intel Corporation Skylake Host Bridge/DRAM Registers (rev 07)
00:02.0 VGA compatible controller: Intel Corporation HD Graphics 530 (rev 06)
00:14.0 USB controller: Intel Corporation Sunrise Point-H USB 3.0 xHCI Controller (rev 31)
00:16.0 Communication controller: Intel Corporation Sunrise Point-H CSME HECI #1 (rev 31)
00:17.0 SATA controller: Intel Corporation Sunrise Point-H SATA controller [AHCI mode] (rev 31)
00:1b.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Root Port #17 (rev f1)
00:1c.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #1 (rev f1)
00:1c.2 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #3 (rev f1)
00:1c.3 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #4 (rev f1)
00:1d.0 PCI bridge: Intel Corporation Sunrise Point-H PCI Express Root Port #9 (rev f1)
00:1f.0 ISA bridge: Intel Corporation Sunrise Point-H LPC Controller (rev 31)
00:1f.2 Memory controller: Intel Corporation Sunrise Point-H PMC (rev 31)
00:1f.3 Audio device: Intel Corporation Sunrise Point-H HD Audio (rev 31)
00:1f.4 SMBus: Intel Corporation Sunrise Point-H SMBus (rev 31)
03:00.0 PCI bridge: ASMedia Technology Inc. ASM1083/1085 PCIe to PCI Bridge (rev 04)
05:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)

Output of lsmod

Module                  Size  Used by
xt_CHECKSUM            16384  1
ipt_MASQUERADE         16384  3
nf_nat_masquerade_ipv4    16384  1 ipt_MASQUERADE
tun                    28672  1
nf_conntrack_netbios_ns    16384  1
nf_conntrack_broadcast    16384  1 nf_conntrack_netbios_ns
xt_CT                  16384  1
ip6t_rpfilter          16384  1
ip6t_REJECT            16384  2
nf_reject_ipv6         16384  1 ip6t_REJECT
xt_conntrack           16384  22
ip_set                 36864  0
nfnetlink              16384  1 ip_set
ebtable_nat            16384  1
ebtable_broute         16384  1
bridge                143360  1 ebtable_broute
stp                    16384  1 bridge
llc                    16384  2 bridge,stp
ip6table_nat           16384  1
nf_conntrack_ipv6      20480  12
nf_defrag_ipv6         36864  1 nf_conntrack_ipv6
nf_nat_ipv6            16384  1 ip6table_nat
ip6table_mangle        16384  1
ip6table_raw           16384  1
ip6table_security      16384  1
iptable_nat            16384  1
nf_conntrack_ipv4      16384  16
nf_defrag_ipv4         16384  1 nf_conntrack_ipv4
nf_nat_ipv4            16384  1 iptable_nat
nf_nat                 28672  3 nf_nat_ipv6,nf_nat_masquerade_ipv4,nf_nat_ipv4
nf_conntrack          131072  11 nf_conntrack_ipv6,nf_conntrack_ipv4,ipt_MASQUERADE,nf_conntrack_broadcast,nf_conntrack_netbios_ns,xt_CT,nf_nat_ipv6,nf_nat_masquerade_ipv4,xt_conntrack,nf_nat_ipv4,nf_nat
libcrc32c              16384  2 nf_conntrack,nf_nat
iptable_mangle         16384  1
iptable_raw            16384  1
iptable_security       16384  1
ebtable_filter         16384  1
ebtables               32768  3 ebtable_filter,ebtable_nat,ebtable_broute
ip6table_filter        16384  1
ip6_tables             28672  5 ip6table_mangle,ip6table_filter,ip6table_security,ip6table_raw,ip6table_nat
sunrpc                331776  1
vfat                   20480  1
fat                    69632  1 vfat
uvcvideo               90112  0
videobuf2_vmalloc      16384  1 uvcvideo
videobuf2_memops       16384  1 videobuf2_vmalloc
videobuf2_v4l2 ...