F27: cannot open a Plasma session (after upgrade from F25)

[Frédéric]

Hi,

I have upgraded my system from F25 to F27 and cannot open a Plasma
session anymore. Here is the output of dmesg:

sddm-helper[1275]: segfault at 0 ip 00007f93c794db6e sp
00007fffd970c610 error 4 in libc-2.26.so

F

More of dmesg:
[    7.519537] input: HDA NVidia HDMI/DP,pcm=3 as
/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input22
[    7.519606] input: HDA NVidia HDMI/DP,pcm=7 as
/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input23
[    7.519659] input: HDA NVidia HDMI/DP,pcm=8 as
/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input24
[    7.519714] input: HDA NVidia HDMI/DP,pcm=9 as
/devices/pci0000:00/0000:00:01.0/0000:01:00.1/sound/card1/input25
[    8.500933] ip6_tables: (C) 2000-2006 Netfilter Core Team
[    8.572540] Ebtables v2.0 registered
[    8.902681] IPv6: ADDRCONF(NETDEV_UP): enp3s0f0: link is not ready
[    8.902864] jme 0000:03:00.0 enp3s0f0: Link is down
[    8.926596] jme 0000:03:00.0 enp3s0f0: Link is down
[    8.926652] IPv6: ADDRCONF(NETDEV_UP): enp3s0f0: link is not ready
[    8.931225] IPv6: ADDRCONF(NETDEV_UP): wlp4s0: link is not ready
[    8.946473] nf_conntrack version 0.5.0 (65536 buckets, 262144 max)
[    9.129976] NVIDIA ACPI Video Driver: probe of PNP0A08:00 failed
with error -22
[    9.135156] ACPI Warning: \_SB.PCI0.PEG0.MXM3._DSM: Argument #4
type mismatch - Found [Buffer], ACPI requires [Package]
(20170728/nsarguments-100)
[    9.252209] resource sanity check: requesting [mem
0x000a0000-0x000fffff], which spans more than PCI Bus 0000:00 [mem
0x000a0000-0x000bffff window]
[    9.252379] caller _nv001193rm+0x166/0x1c0 [nvidia] mapping multiple BARs
[    9.268290] resource sanity check: requesting [mem
0x000e0000-0x000fffff], which spans more than PCI Bus 0000:00 [mem
0x000e0000-0x000e3fff window]
[    9.268444] caller _nv029056rm+0x57/0x90 [nvidia] mapping multiple BARs
[    9.814478] bridge: filtering via arp/ip/ip6tables is no longer
available by default. Update your scripts to load br_netfilter if you
need this.
[    9.951798] Netfilter messages via NETLINK v0.30.
[    9.960145] ip_set: protocol 6
[    9.984912] nvidia-modeset: Allocated GPU:0
(GPU-a26ca184-dbb8-cb76-a255-3c1db789ce86) @ PCI:0000:01:00.0
[   11.816623] jme 0000:03:00.0 enp3s0f0: Link is up at ANed: 1000
Mbps, Full-Duplex, MDI
[   11.816774] IPv6: ADDRCONF(NETDEV_CHANGE): enp3s0f0: link becomes ready
[   12.030421] NFSD: starting 90-second grace period (net ffffffff84310600)
[   33.193949] show_signal_msg: 32 callbacks suppressed
[   33.193950] sddm-helper[1275]: segfault at 0 ip 00007f93c794db6e sp
00007fffd970c610 error 4 in libc-2.26.so[7f93c78d6000+1da000]
[   36.217353] nvidia-modeset: Freed GPU:0
(GPU-a26ca184-dbb8-cb76-a255-3c1db789ce86) @ PCI:0000:01:00.0
[   36.536827] NVIDIA ACPI Video Driver: probe of PNP0A08:00 failed
with error -22
[   36.541622] resource sanity check: requesting [mem
0x000a0000-0x000fffff], which spans more than PCI Bus 0000:00 [mem
0x000a0000-0x000bffff window]
[   36.541791] caller _nv001193rm+0x166/0x1c0 [nvidia] mapping multiple BARs
[   36.880502] nvidia-modeset: Allocated GPU:0
(GPU-a26ca184-dbb8-cb76-a255-3c1db789ce86) @ PCI:0000:01:00.0