Network Either Slow Or Constantly Interrupted After Upgrade to Linux Mint Ulyana 20
by PasBern from LinuxQuestions.org on (#5B6F6)
Hi all,
similar to other users I also encounter network problems after upgrading the newest Linux Mint edition.
I have also posted this question on the Linux Mint forum, so far haven't found the solution: https://forums.linuxmint.com/viewtop...30712#p1930712
Other computers in the network like smartphone, iPad, iMac of my girlfriend, Windows computer do not experience any issues. Even when connected to the internet (via wifi or LAN) all of the following happen in random order:
1. slow page loading
2. interrupted internet connections
3. webpages only partially loading
4. downloads interrupted
5. when trying to ping a server I received package run times of several thousand ms and package loss ranging between at least 30% to 90%, most often more than 60% or no server reachable at all
Read through the following threads which gave good ideas, but turning power management off for example (https://easylinuxtipsproject.blogspo...t.html#ID2.1.2) didn't help. Don't think it is a driver issue, as network functioned well before the update
https://forums.linuxmint.com/viewtopic.php?t=325100
https://forums.linuxmint.com/viewtopic.php?t=288035
https://forums.linuxmint.com/viewtop...?f=53&t=335520
https://forums.linuxmint.com/viewtopic.php?t=326812
Here is some information for troubleshooting:
iwconfig
Code:enp0s31f6 no wireless extensions.
vmnet1 no wireless extensions.
vmnet8 no wireless extensions.
lo no wireless extensions.
wlp4s0 IEEE 802.11 ESSID:"MyHuawei"
Mode:Managed Frequency:2.447 GHz Access Point: 98:9C:57:F6:B6:6A
Bit Rate=144.4 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-40 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:7 Missed beacon:0
tun0 no wireless extensions.
lspci -nnk
Code:00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [8086:1910] (rev 07)
Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [17aa:222e]
Kernel driver in use: skl_uncore
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 07)
Kernel driver in use: pcieport
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 530 [8086:191b] (rev 06)
Subsystem: Lenovo HD Graphics 530 [17aa:222e]
Kernel driver in use: i915
Kernel modules: i915
00:14.0 USB controller [0c03]: Intel Corporation 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller [8086:a12f] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller [17aa:222e]
Kernel driver in use: xhci_hcd
00:14.2 Signal processing controller [1180]: Intel Corporation 100 Series/C230 Series Chipset Family Thermal Subsystem [8086:a131] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family Thermal Subsystem [17aa:222e]
Kernel driver in use: intel_pch_thermal
Kernel modules: intel_pch_thermal
00:16.0 Communication controller [0780]: Intel Corporation 100 Series/C230 Series Chipset Family MEI Controller #1 [8086:a13a] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family MEI Controller [17aa:222e]
Kernel driver in use: mei_me
Kernel modules: mei_me
00:16.3 Serial controller [0700]: Intel Corporation 100 Series/C230 Series Chipset Family KT Redirection [8086:a13d] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family KT Redirection [17aa:222e]
Kernel driver in use: serial
00:17.0 SATA controller [0106]: Intel Corporation Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode] [8086:a102] (rev 31)
Subsystem: Lenovo Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode] [17aa:222e]
Kernel driver in use: ahci
Kernel modules: ahci
00:1c.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #1 [8086:a110] (rev f1)
Kernel driver in use: pcieport
00:1c.2 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #3 [8086:a112] (rev f1)
Kernel driver in use: pcieport
00:1c.4 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #5 [8086:a114] (rev f1)
Kernel driver in use: pcieport
00:1d.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #13 [8086:a11c] (rev f1)
Kernel driver in use: pcieport
00:1f.0 ISA bridge [0601]: Intel Corporation CM236 Chipset LPC/eSPI Controller [8086:a150] (rev 31)
Subsystem: Lenovo CM236 Chipset LPC/eSPI Controller [17aa:222e]
00:1f.2 Memory controller [0580]: Intel Corporation 100 Series/C230 Series Chipset Family Power Management Controller [8086:a121] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family Power Management Controller [17aa:222e]
00:1f.3 Audio device [0403]: Intel Corporation 100 Series/C230 Series Chipset Family HD Audio Controller [8086:a170] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family HD Audio Controller [17aa:222e]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1f.4 SMBus [0c05]: Intel Corporation 100 Series/C230 Series Chipset Family SMBus [8086:a123] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family SMBus [17aa:222e]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (2) I219-LM [8086:15b7] (rev 31)
Subsystem: Lenovo Ethernet Connection (2) I219-LM [17aa:2233]
Kernel driver in use: e1000e
Kernel modules: e1000e
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM107GLM [Quadro M2000M] [10de:13b0] (rev a2)
Subsystem: Lenovo GM107GLM [Quadro M2000M] [17aa:222e]
Kernel driver in use: nouveau
Kernel modules: nvidiafb, nouveau
01:00.1 Audio device [0403]: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] [10de:0fbc] (rev a1)
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
04:00.0 Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)
Subsystem: Intel Corporation Wireless 8260 [8086:0130]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
3e:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
Subsystem: Lenovo RTS525A PCI Express Card Reader [17aa:222e]
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pcirfkill list all
Code:0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: yes
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
inxi -Fxz
Code:System: Kernel: 5.4.0-54-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 4.6.7
Distro: Linux Mint 20 Ulyana base: Ubuntu 20.04 focal
Machine: Type: Laptop System: LENOVO product: 20EN0006GE v: ThinkPad P50 serial: <filter>
Mobo: LENOVO model: 20EN0006GE v: 0B98417 WIN serial: <filter> UEFI [Legacy]: LENOVO v: N1EET57W (1.30 )
date: 08/03/2016
Battery: ID-1: BAT0 charge: 38.2 Wh condition: 73.2/90.1 Wh (81%) model: LGC 00NY492 status: Discharging
CPU: Topology: Quad Core model: Intel Core i7-6820HQ bits: 64 type: MT MCP arch: Skylake-S rev: 3 L2 cache: 8192 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 43198
Speed: 800 MHz min/max: 800/3600 MHz Core speeds (MHz): 1: 801 2: 801 3: 800 4: 800 5: 800 6: 800 7: 800 8: 800
Graphics: Device-1: Intel HD Graphics 530 vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0
Device-2: NVIDIA GM107GLM [Quadro M2000M] vendor: Lenovo driver: nouveau v: kernel bus ID: 01:00.0
Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa Intel HD Graphics 530 (SKL GT2) v: 4.6 Mesa 20.0.8 direct render: Yes
Audio: Device-1: Intel 100 Series/C230 Series Family HD Audio vendor: Lenovo driver: snd_hda_intel v: kernel
bus ID: 00:1f.3
Device-2: NVIDIA GM107 High Definition Audio [GeForce 940MX] driver: snd_hda_intel v: kernel bus ID: 01:00.1
Sound Server: ALSA v: k5.4.0-54-generic
Network: Device-1: Intel Ethernet I219-LM vendor: Lenovo driver: e1000e v: 3.2.6-k port: efa0 bus ID: 00:1f.6
IF: enp0s31f6 state: down mac: <filter>
Device-2: Intel Wireless 8260 driver: iwlwifi v: kernel port: 4000 bus ID: 04:00.0
IF: wlp4s0 state: up mac: <filter>
IF-ID-1: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A
IF-ID-2: vmnet1 state: unknown speed: N/A duplex: N/A mac: <filter>
IF-ID-3: vmnet8 state: unknown speed: N/A duplex: N/A mac: <filter>
Drives: Local Storage: total: 953.91 GiB used: 987.55 GiB (103.5%)
ID-1: /dev/mmcblk0 model: EE8QT size: 238.50 GiB
ID-2: /dev/sda vendor: Samsung model: MZNLN256HCHP-000L7 size: 238.47 GiB temp: 31 C
ID-3: /dev/sdb vendor: Samsung model: SSD 850 PRO 512GB size: 476.94 GiB
Partition: ID-1: / size: 228.17 GiB used: 197.77 GiB (86.7%) fs: ext4 dev: /dev/sda6
ID-2: /boot size: 940.7 MiB used: 208.8 MiB (22.2%) fs: ext3 dev: /dev/sda1
ID-3: swap-1 size: 4.69 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda5
Sensors: System Temperatures: cpu: 42.0 C mobo: 35.0 C gpu: nouveau temp: 39 C
Fan Speeds (RPM): cpu: 0
Info: Processes: 359 Uptime: 18m Memory: 22.89 GiB used: 3.16 GiB (13.8%) Init: systemd runlevel: 5 Compilers: gcc: 9.3.0
Shell: bash v: 5.0.17 inxi: 3.0.38Maybe it has also to do with my nameserver settings, my/etc/resolv.conf looks like the following:
Code:# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 10.255.255.2
nameserver 127.0.0.53
Hope, someone has an idea where I can look further.
Many thanks in advance,
Pascal
similar to other users I also encounter network problems after upgrading the newest Linux Mint edition.
I have also posted this question on the Linux Mint forum, so far haven't found the solution: https://forums.linuxmint.com/viewtop...30712#p1930712
Other computers in the network like smartphone, iPad, iMac of my girlfriend, Windows computer do not experience any issues. Even when connected to the internet (via wifi or LAN) all of the following happen in random order:
1. slow page loading
2. interrupted internet connections
3. webpages only partially loading
4. downloads interrupted
5. when trying to ping a server I received package run times of several thousand ms and package loss ranging between at least 30% to 90%, most often more than 60% or no server reachable at all
Read through the following threads which gave good ideas, but turning power management off for example (https://easylinuxtipsproject.blogspo...t.html#ID2.1.2) didn't help. Don't think it is a driver issue, as network functioned well before the update
https://forums.linuxmint.com/viewtopic.php?t=325100
https://forums.linuxmint.com/viewtopic.php?t=288035
https://forums.linuxmint.com/viewtop...?f=53&t=335520
https://forums.linuxmint.com/viewtopic.php?t=326812
Here is some information for troubleshooting:
iwconfig
Code:enp0s31f6 no wireless extensions.
vmnet1 no wireless extensions.
vmnet8 no wireless extensions.
lo no wireless extensions.
wlp4s0 IEEE 802.11 ESSID:"MyHuawei"
Mode:Managed Frequency:2.447 GHz Access Point: 98:9C:57:F6:B6:6A
Bit Rate=144.4 Mb/s Tx-Power=22 dBm
Retry short limit:7 RTS thr:off Fragment thr:off
Power Management:off
Link Quality=70/70 Signal level=-40 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:7 Missed beacon:0
tun0 no wireless extensions.
lspci -nnk
Code:00:00.0 Host bridge [0600]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [8086:1910] (rev 07)
Subsystem: Lenovo Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Host Bridge/DRAM Registers [17aa:222e]
Kernel driver in use: skl_uncore
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor PCIe Controller (x16) [8086:1901] (rev 07)
Kernel driver in use: pcieport
00:02.0 VGA compatible controller [0300]: Intel Corporation HD Graphics 530 [8086:191b] (rev 06)
Subsystem: Lenovo HD Graphics 530 [17aa:222e]
Kernel driver in use: i915
Kernel modules: i915
00:14.0 USB controller [0c03]: Intel Corporation 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller [8086:a12f] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family USB 3.0 xHCI Controller [17aa:222e]
Kernel driver in use: xhci_hcd
00:14.2 Signal processing controller [1180]: Intel Corporation 100 Series/C230 Series Chipset Family Thermal Subsystem [8086:a131] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family Thermal Subsystem [17aa:222e]
Kernel driver in use: intel_pch_thermal
Kernel modules: intel_pch_thermal
00:16.0 Communication controller [0780]: Intel Corporation 100 Series/C230 Series Chipset Family MEI Controller #1 [8086:a13a] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family MEI Controller [17aa:222e]
Kernel driver in use: mei_me
Kernel modules: mei_me
00:16.3 Serial controller [0700]: Intel Corporation 100 Series/C230 Series Chipset Family KT Redirection [8086:a13d] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family KT Redirection [17aa:222e]
Kernel driver in use: serial
00:17.0 SATA controller [0106]: Intel Corporation Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode] [8086:a102] (rev 31)
Subsystem: Lenovo Q170/Q150/B150/H170/H110/Z170/CM236 Chipset SATA Controller [AHCI Mode] [17aa:222e]
Kernel driver in use: ahci
Kernel modules: ahci
00:1c.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #1 [8086:a110] (rev f1)
Kernel driver in use: pcieport
00:1c.2 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #3 [8086:a112] (rev f1)
Kernel driver in use: pcieport
00:1c.4 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #5 [8086:a114] (rev f1)
Kernel driver in use: pcieport
00:1d.0 PCI bridge [0604]: Intel Corporation 100 Series/C230 Series Chipset Family PCI Express Root Port #13 [8086:a11c] (rev f1)
Kernel driver in use: pcieport
00:1f.0 ISA bridge [0601]: Intel Corporation CM236 Chipset LPC/eSPI Controller [8086:a150] (rev 31)
Subsystem: Lenovo CM236 Chipset LPC/eSPI Controller [17aa:222e]
00:1f.2 Memory controller [0580]: Intel Corporation 100 Series/C230 Series Chipset Family Power Management Controller [8086:a121] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family Power Management Controller [17aa:222e]
00:1f.3 Audio device [0403]: Intel Corporation 100 Series/C230 Series Chipset Family HD Audio Controller [8086:a170] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family HD Audio Controller [17aa:222e]
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
00:1f.4 SMBus [0c05]: Intel Corporation 100 Series/C230 Series Chipset Family SMBus [8086:a123] (rev 31)
Subsystem: Lenovo 100 Series/C230 Series Chipset Family SMBus [17aa:222e]
Kernel driver in use: i801_smbus
Kernel modules: i2c_i801
00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (2) I219-LM [8086:15b7] (rev 31)
Subsystem: Lenovo Ethernet Connection (2) I219-LM [17aa:2233]
Kernel driver in use: e1000e
Kernel modules: e1000e
01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM107GLM [Quadro M2000M] [10de:13b0] (rev a2)
Subsystem: Lenovo GM107GLM [Quadro M2000M] [17aa:222e]
Kernel driver in use: nouveau
Kernel modules: nvidiafb, nouveau
01:00.1 Audio device [0403]: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] [10de:0fbc] (rev a1)
Kernel driver in use: snd_hda_intel
Kernel modules: snd_hda_intel
04:00.0 Network controller [0280]: Intel Corporation Wireless 8260 [8086:24f3] (rev 3a)
Subsystem: Intel Corporation Wireless 8260 [8086:0130]
Kernel driver in use: iwlwifi
Kernel modules: iwlwifi
3e:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS525A PCI Express Card Reader [10ec:525a] (rev 01)
Subsystem: Lenovo RTS525A PCI Express Card Reader [17aa:222e]
Kernel driver in use: rtsx_pci
Kernel modules: rtsx_pcirfkill list all
Code:0: tpacpi_bluetooth_sw: Bluetooth
Soft blocked: yes
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
inxi -Fxz
Code:System: Kernel: 5.4.0-54-generic x86_64 bits: 64 compiler: gcc v: 9.3.0 Desktop: Cinnamon 4.6.7
Distro: Linux Mint 20 Ulyana base: Ubuntu 20.04 focal
Machine: Type: Laptop System: LENOVO product: 20EN0006GE v: ThinkPad P50 serial: <filter>
Mobo: LENOVO model: 20EN0006GE v: 0B98417 WIN serial: <filter> UEFI [Legacy]: LENOVO v: N1EET57W (1.30 )
date: 08/03/2016
Battery: ID-1: BAT0 charge: 38.2 Wh condition: 73.2/90.1 Wh (81%) model: LGC 00NY492 status: Discharging
CPU: Topology: Quad Core model: Intel Core i7-6820HQ bits: 64 type: MT MCP arch: Skylake-S rev: 3 L2 cache: 8192 KiB
flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx bogomips: 43198
Speed: 800 MHz min/max: 800/3600 MHz Core speeds (MHz): 1: 801 2: 801 3: 800 4: 800 5: 800 6: 800 7: 800 8: 800
Graphics: Device-1: Intel HD Graphics 530 vendor: Lenovo driver: i915 v: kernel bus ID: 00:02.0
Device-2: NVIDIA GM107GLM [Quadro M2000M] vendor: Lenovo driver: nouveau v: kernel bus ID: 01:00.0
Display: x11 server: X.Org 1.20.8 driver: modesetting unloaded: fbdev,vesa resolution: 1920x1080~60Hz
OpenGL: renderer: Mesa Intel HD Graphics 530 (SKL GT2) v: 4.6 Mesa 20.0.8 direct render: Yes
Audio: Device-1: Intel 100 Series/C230 Series Family HD Audio vendor: Lenovo driver: snd_hda_intel v: kernel
bus ID: 00:1f.3
Device-2: NVIDIA GM107 High Definition Audio [GeForce 940MX] driver: snd_hda_intel v: kernel bus ID: 01:00.1
Sound Server: ALSA v: k5.4.0-54-generic
Network: Device-1: Intel Ethernet I219-LM vendor: Lenovo driver: e1000e v: 3.2.6-k port: efa0 bus ID: 00:1f.6
IF: enp0s31f6 state: down mac: <filter>
Device-2: Intel Wireless 8260 driver: iwlwifi v: kernel port: 4000 bus ID: 04:00.0
IF: wlp4s0 state: up mac: <filter>
IF-ID-1: tun0 state: unknown speed: 10 Mbps duplex: full mac: N/A
IF-ID-2: vmnet1 state: unknown speed: N/A duplex: N/A mac: <filter>
IF-ID-3: vmnet8 state: unknown speed: N/A duplex: N/A mac: <filter>
Drives: Local Storage: total: 953.91 GiB used: 987.55 GiB (103.5%)
ID-1: /dev/mmcblk0 model: EE8QT size: 238.50 GiB
ID-2: /dev/sda vendor: Samsung model: MZNLN256HCHP-000L7 size: 238.47 GiB temp: 31 C
ID-3: /dev/sdb vendor: Samsung model: SSD 850 PRO 512GB size: 476.94 GiB
Partition: ID-1: / size: 228.17 GiB used: 197.77 GiB (86.7%) fs: ext4 dev: /dev/sda6
ID-2: /boot size: 940.7 MiB used: 208.8 MiB (22.2%) fs: ext3 dev: /dev/sda1
ID-3: swap-1 size: 4.69 GiB used: 0 KiB (0.0%) fs: swap dev: /dev/sda5
Sensors: System Temperatures: cpu: 42.0 C mobo: 35.0 C gpu: nouveau temp: 39 C
Fan Speeds (RPM): cpu: 0
Info: Processes: 359 Uptime: 18m Memory: 22.89 GiB used: 3.16 GiB (13.8%) Init: systemd runlevel: 5 Compilers: gcc: 9.3.0
Shell: bash v: 5.0.17 inxi: 3.0.38Maybe it has also to do with my nameserver settings, my/etc/resolv.conf looks like the following:
Code:# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
# 127.0.0.53 is the systemd-resolved stub resolver.
# run "systemd-resolve --status" to see details about the actual nameservers.
nameserver 10.255.255.2
nameserver 127.0.0.53
Hope, someone has an idea where I can look further.
Many thanks in advance,
Pascal