Hi. I'am running Zorin OS 16 Pro on an Dell XPS 9500
When i'am opening the Network Displays app the wifi seems to somehow crash.
Running
sudo systemctl restart network-manager.service
Gets the wifi back up.
Anhy ideas why this is happening?
Can you check Device supports active Monitor (You may need to scroll down a bit...):
iw list
Also, please check here if this driver is a better match for your system:
Could not find the Line Device Supports active monitor so i guess not
Summary
Wiphy phy0
max # scan SSIDs: 20
max scan IEs length: 365 bytes
max # sched scan SSIDs: 20
max # match sets: 8
Retry short limit: 7
Retry long limit: 4
Coverage class: 0 (up to 0m)
Device supports RSN-IBSS.
Device supports AP-side u-APSD.
Device supports T-DLS.
Supported Ciphers:
* WEP40 (00-0f-ac:1)
* WEP104 (00-0f-ac:5)
* TKIP (00-0f-ac:2)
* CCMP-128 (00-0f-ac:4)
* GCMP-128 (00-0f-ac:8)
* GCMP-256 (00-0f-ac:9)
* CMAC (00-0f-ac:6)
* GMAC-128 (00-0f-ac:11)
* GMAC-256 (00-0f-ac:12)
Available Antennas: TX 0x3 RX 0x3
Configured Antennas: TX 0x3 RX 0x3
Supported interface modes:
* IBSS
* managed
* AP
* AP/VLAN
* monitor
* P2P-client
* P2P-GO
* P2P-device
Band 1:
Capabilities: 0x19ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 4 usec (0x05)
HT Max RX data rate: 300 Mbps
HT TX/RX MCS rate indexes supported: 0-15
HE Iftypes: Station
HE MAC Capabilities (0x78031220abc0):
+HTC HE Supported
TWT Requester
Trigger Frame MAC Padding Duration: 2
Multi-TID Aggregation Support: 7
32-bit BA Bitmap
OM Control
Maximum A-MPDU Length Exponent: 2
A-MSDU in A-MPDU
Multi-TID Aggregation TX: 7
UL 2x996-Tone RU
HE PHY Capabilities: (0x0e3f0200fd09800ecff200):
HE40/2.4GHz
HE40/HE80/5GHz
HE160/5GHz
Punctured Preamble RX: 15
Device Class: 1
LDPC Coding in Payload
NDP with 4x HE-LTF and 3.2us GI
SU Beamformee
Beamformee STS <= 80Mhz: 7
Beamformee STS > 80Mhz: 7
Sounding Dimensions <= 80Mhz: 1
Sounding Dimensions > 80Mhz: 1
PPE Threshold Present
Power Boost Factor ar
HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
Max NC: 1
HE ER SU PPDU 4x HE-LTF 0.8us GI
20MHz in 40MHz HE PPDU 2.4GHz
20MHz in 160/80+80MHz HE PPDU
80MHz in 160/80+80MHz HE PPDU
DCM Max BW: 3
Non-Triggered CQI Feedback
RX Full BW SU Using HE MU PPDU with Compression SIGB
RX Full BW SU Using HE MU PPDU with Non-Compression SIGB
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE RX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x61 0x1c 0xc7 0x71
HE Iftypes: AP
HE MAC Capabilities (0x780112080840):
+HTC HE Supported
Trigger Frame MAC Padding Duration: 2
Multi-TID Aggregation Support: 7
BSR
OM Control
Maximum A-MPDU Length Exponent: 2
A-MSDU in A-MPDU
UL 2x996-Tone RU
HE PHY Capabilities: (0x0e200200fd09800ccff000):
HE40/2.4GHz
HE40/HE80/5GHz
HE160/5GHz
LDPC Coding in Payload
NDP with 4x HE-LTF and 3.2us GI
SU Beamformee
Beamformee STS <= 80Mhz: 7
Beamformee STS > 80Mhz: 7
Sounding Dimensions <= 80Mhz: 1
Sounding Dimensions > 80Mhz: 1
PPE Threshold Present
HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
Max NC: 1
HE ER SU PPDU 4x HE-LTF 0.8us GI
20MHz in 40MHz HE PPDU 2.4GHz
20MHz in 160/80+80MHz HE PPDU
80MHz in 160/80+80MHz HE PPDU
DCM Max BW: 3
RX Full BW SU Using HE MU PPDU with Compression SIGB
RX Full BW SU Using HE MU PPDU with Non-Compression SIGB
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE RX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x61 0x1c 0xc7 0x71
Bitrates (non-HT):
* 1.0 Mbps
* 2.0 Mbps (short preamble supported)
* 5.5 Mbps (short preamble supported)
* 11.0 Mbps (short preamble supported)
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 2412 MHz [1] (22.0 dBm)
* 2417 MHz [2] (22.0 dBm)
* 2422 MHz [3] (22.0 dBm)
* 2427 MHz [4] (22.0 dBm)
* 2432 MHz [5] (22.0 dBm)
* 2437 MHz [6] (22.0 dBm)
* 2442 MHz [7] (22.0 dBm)
* 2447 MHz [8] (22.0 dBm)
* 2452 MHz [9] (22.0 dBm)
* 2457 MHz [10] (22.0 dBm)
* 2462 MHz [11] (22.0 dBm)
* 2467 MHz [12] (22.0 dBm)
* 2472 MHz [13] (22.0 dBm)
* 2484 MHz [14] (disabled)
Band 2:
Capabilities: 0x19ef
RX LDPC
HT20/HT40
SM Power Save disabled
RX HT20 SGI
RX HT40 SGI
TX STBC
RX STBC 1-stream
Max AMSDU length: 7935 bytes
DSSS/CCK HT40
Maximum RX AMPDU length 65535 bytes (exponent: 0x003)
Minimum RX AMPDU time spacing: 4 usec (0x05)
HT Max RX data rate: 300 Mbps
HT TX/RX MCS rate indexes supported: 0-15
VHT Capabilities (0x039071f6):
Max MPDU length: 11454
Supported Channel Width: 160 MHz
RX LDPC
short GI (80 MHz)
short GI (160/80+80 MHz)
TX STBC
SU Beamformee
MU Beamformee
VHT RX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT RX highest supported: 0 Mbps
VHT TX MCS set:
1 streams: MCS 0-9
2 streams: MCS 0-9
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
VHT TX highest supported: 0 Mbps
HE Iftypes: Station
HE MAC Capabilities (0x78031220abc0):
+HTC HE Supported
TWT Requester
Trigger Frame MAC Padding Duration: 2
Multi-TID Aggregation Support: 7
32-bit BA Bitmap
OM Control
Maximum A-MPDU Length Exponent: 2
A-MSDU in A-MPDU
Multi-TID Aggregation TX: 7
UL 2x996-Tone RU
HE PHY Capabilities: (0x0e3f0200fd09800ecff200):
HE40/2.4GHz
HE40/HE80/5GHz
HE160/5GHz
Punctured Preamble RX: 15
Device Class: 1
LDPC Coding in Payload
NDP with 4x HE-LTF and 3.2us GI
SU Beamformee
Beamformee STS <= 80Mhz: 7
Beamformee STS > 80Mhz: 7
Sounding Dimensions <= 80Mhz: 1
Sounding Dimensions > 80Mhz: 1
PPE Threshold Present
Power Boost Factor ar
HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
Max NC: 1
HE ER SU PPDU 4x HE-LTF 0.8us GI
20MHz in 40MHz HE PPDU 2.4GHz
20MHz in 160/80+80MHz HE PPDU
80MHz in 160/80+80MHz HE PPDU
DCM Max BW: 3
Non-Triggered CQI Feedback
RX Full BW SU Using HE MU PPDU with Compression SIGB
RX Full BW SU Using HE MU PPDU with Non-Compression SIGB
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE RX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x61 0x1c 0xc7 0x71
HE Iftypes: AP
HE MAC Capabilities (0x780112080840):
+HTC HE Supported
Trigger Frame MAC Padding Duration: 2
Multi-TID Aggregation Support: 7
BSR
OM Control
Maximum A-MPDU Length Exponent: 2
A-MSDU in A-MPDU
UL 2x996-Tone RU
HE PHY Capabilities: (0x0e200200fd09800ccff000):
HE40/2.4GHz
HE40/HE80/5GHz
HE160/5GHz
LDPC Coding in Payload
NDP with 4x HE-LTF and 3.2us GI
SU Beamformee
Beamformee STS <= 80Mhz: 7
Beamformee STS > 80Mhz: 7
Sounding Dimensions <= 80Mhz: 1
Sounding Dimensions > 80Mhz: 1
PPE Threshold Present
HE SU PPDU & HE PPDU 4x HE-LTF 0.8us GI
Max NC: 1
HE ER SU PPDU 4x HE-LTF 0.8us GI
20MHz in 40MHz HE PPDU 2.4GHz
20MHz in 160/80+80MHz HE PPDU
80MHz in 160/80+80MHz HE PPDU
DCM Max BW: 3
RX Full BW SU Using HE MU PPDU with Compression SIGB
RX Full BW SU Using HE MU PPDU with Non-Compression SIGB
HE RX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set <= 80 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE RX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
HE TX MCS and NSS set 160 MHz
1 streams: MCS 0-11
2 streams: MCS 0-11
3 streams: not supported
4 streams: not supported
5 streams: not supported
6 streams: not supported
7 streams: not supported
8 streams: not supported
PPE Threshold 0x61 0x1c 0xc7 0x71
Bitrates (non-HT):
* 6.0 Mbps
* 9.0 Mbps
* 12.0 Mbps
* 18.0 Mbps
* 24.0 Mbps
* 36.0 Mbps
* 48.0 Mbps
* 54.0 Mbps
Frequencies:
* 5180 MHz [36] (22.0 dBm) (no IR)
* 5200 MHz [40] (22.0 dBm) (no IR)
* 5220 MHz [44] (22.0 dBm) (no IR)
* 5240 MHz [48] (22.0 dBm) (no IR)
* 5260 MHz [52] (22.0 dBm) (no IR, radar detection)
* 5280 MHz [56] (22.0 dBm) (no IR, radar detection)
* 5300 MHz [60] (22.0 dBm) (no IR, radar detection)
* 5320 MHz [64] (22.0 dBm) (no IR, radar detection)
* 5340 MHz [68] (disabled)
* 5360 MHz [72] (disabled)
* 5380 MHz [76] (disabled)
* 5400 MHz [80] (disabled)
* 5420 MHz [84] (disabled)
* 5440 MHz [88] (disabled)
* 5460 MHz [92] (disabled)
* 5480 MHz [96] (disabled)
* 5500 MHz [100] (22.0 dBm) (no IR, radar detection)
* 5520 MHz [104] (22.0 dBm) (no IR, radar detection)
* 5540 MHz [108] (22.0 dBm) (no IR, radar detection)
* 5560 MHz [112] (22.0 dBm) (no IR, radar detection)
* 5580 MHz [116] (22.0 dBm) (no IR, radar detection)
* 5600 MHz [120] (22.0 dBm) (no IR, radar detection)
* 5620 MHz [124] (22.0 dBm) (no IR, radar detection)
* 5640 MHz [128] (22.0 dBm) (no IR, radar detection)
* 5660 MHz [132] (22.0 dBm) (no IR, radar detection)
* 5680 MHz [136] (22.0 dBm) (no IR, radar detection)
* 5700 MHz [140] (22.0 dBm) (no IR, radar detection)
* 5720 MHz [144] (22.0 dBm) (no IR, radar detection)
* 5745 MHz [149] (22.0 dBm)
* 5765 MHz [153] (22.0 dBm)
* 5785 MHz [157] (22.0 dBm)
* 5805 MHz [161] (22.0 dBm)
* 5825 MHz [165] (22.0 dBm)
* 5845 MHz [169] (disabled)
* 5865 MHz [173] (disabled)
* 5885 MHz [177] (disabled)
* 5905 MHz [181] (disabled)
Supported commands:
* new_interface
* set_interface
* new_key
* start_ap
* new_station
* new_mpath
* set_mesh_config
* set_bss
* authenticate
* associate
* deauthenticate
* disassociate
* join_ibss
* join_mesh
* remain_on_channel
* set_tx_bitrate_mask
* frame
* frame_wait_cancel
* set_wiphy_netns
* set_channel
* tdls_mgmt
* tdls_oper
* start_sched_scan
* probe_client
* set_noack_map
* register_beacons
* start_p2p_device
* set_mcast_rate
* connect
* disconnect
* channel_switch
* set_qos_map
* add_tx_ts
* set_multicast_to_unicast
WoWLAN support:
* wake up on disconnect
* wake up on magic packet
* wake up on pattern match, up to 20 patterns of 16-128 bytes,
maximum packet offset 0 bytes
* can do GTK rekeying
* wake up on GTK rekey failure
* wake up on EAP identity request
* wake up on 4-way handshake
* wake up on rfkill release
* wake up on network detection, up to 8 match sets
software interface modes (can always be added):
* AP/VLAN
* monitor
valid interface combinations:
* #{ managed } <= 1, #{ AP, P2P-client, P2P-GO } <= 1, #{ P2P-device } <= 1,
total <= 3, #channels <= 2
HT Capability overrides:
* MCS: ff ff ff ff ff ff ff ff ff ff
* maximum A-MSDU length
* supported channel width
* short GI for 40 MHz
* max A-MPDU length exponent
* min MPDU start spacing
Device supports TX status socket option.
Device supports HT-IBSS.
Device supports SAE with AUTHENTICATE command
Device supports low priority scan.
Device supports scan flush.
Device supports per-vif TX power setting
P2P GO supports CT window setting
P2P GO supports opportunistic powersave setting
Driver supports full state transitions for AP/GO clients
Driver supports a userspace MPM
Driver/device bandwidth changes during BSS lifetime (AP/GO mode)
Device adds DS IE to probe requests
Device can update TPC Report IE
Device supports static SMPS
Device supports dynamic SMPS
Device supports WMM-AC admission (TSPECs)
Device supports configuring vdev MAC-addr on create.
Device supports randomizing MAC-addr in scans.
Device supports randomizing MAC-addr in sched scans.
Device supports randomizing MAC-addr in net-detect scans.
max # scan plans: 2
max scan plan interval: 65535
max scan plan iterations: 254
Supported TX frame types:
* IBSS: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* managed: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* AP: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* AP/VLAN: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* mesh point: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-client: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-GO: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
* P2P-device: 0x00 0x10 0x20 0x30 0x40 0x50 0x60 0x70 0x80 0x90 0xa0 0xb0 0xc0 0xd0 0xe0 0xf0
Supported RX frame types:
* IBSS: 0x40 0xb0 0xc0 0xd0
* managed: 0x40 0xb0 0xd0
* AP: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* AP/VLAN: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* mesh point: 0xb0 0xc0 0xd0
* P2P-client: 0x40 0xd0
* P2P-GO: 0x00 0x20 0x40 0xa0 0xb0 0xc0 0xd0
* P2P-device: 0x40 0xd0
Supported extended features:
* [ VHT_IBSS ]: VHT-IBSS
* [ RRM ]: RRM
* [ MU_MIMO_AIR_SNIFFER ]: MU-MIMO sniffer
* [ SCAN_START_TIME ]: scan start timestamp
* [ BSS_PARENT_TSF ]: BSS last beacon/probe TSF
* [ FILS_STA ]: STA FILS (Fast Initial Link Setup)
* [ CONTROL_PORT_OVER_NL80211 ]: control port over nl80211
* [ TXQS ]: FQ-CoDel-enabled intermediate TXQs
Also this computer av a Killer Wifi card i think so i dont know if the Realtek driver will work? 
1 Like
It's such a common one though... see what happens when I get into a hurry...
What model of Killer Wireless is it?
Off-hand, looks like Killer Wireless should work with the 5.11 kernel (Zorin OS) as it was patched in kernel 5.10. That is pretty recent, though...
But you may need to update the BIOS firmware on the computer for it to work.
At least you have net connection.
It is the Killer AX1650s
Yes this is not an critical issue at all for me, avoiding the network display app is no problem.
Do you think this info might help?
https://www.intel.com/content/www/us/en/support/articles/000058909/wireless/intel-wireless-products.html
1 Like
Hi. Thanks for the suggestion.
It seems the system already autodetected and is running this driver i think.
sudo lshw -C network
*-network
description: Wireless interface
product: Wi-Fi 6 AX201
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
logical name: wlp0s20f3
version: 00
serial: 40:ec:99:bb:0c:8d
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.11.0-27-generic firmware=59.601f3a66.0 QuZ-a0-hr-b0-59.u ip=192.168.4.140 latency=0 link=yes multicast=yes wireless=IEEE 802.11
resources: iomemory:600-5ff irq:16 memory:604b11c000-604b11ffff
So it is working the way it should now?
No. This is the driver it has choosen. So this is the config that does not work.
However it seems to bee only the Network Display App so it is not a big deal for me.
Yes, this is a strange symptom. I have never heard of this particular issue before. I agree that at least it is not a show stopper... It's annoying to not know something, though. 
1 Like
Hehe yes agreed.
I have this problem on an HP Omen Gaming Laptop. It's a bit annoying as I actually want to stream to my TV 
I've raised a ticket because I have the Pro version of ZOrin OS
1 Like
Exact same issue on a Dell XPS 9310 with Zorin Pro 16.2!
Running Gnome Network Displays immediately crashes the WiFi. I usually restart the entire laptop to fix it 
Any more solutions?
Did a bit of web searching using "Gnome Network Displays Ubuntu 20.04 crashes WiFi".
Seems Gnome Network Displays is problematic on newer versions of Ubuntu. See: Ubuntu 20.04 LTS / 21.10 + Samsung 6 Series (#221) · Issues · GNOME / gnome-network-displays · GitLab
Do you see any error messages?
1 Like
Nope, no error messages.
I checked out the issue, and compiled wpa_supplicant with the following steps: steps to compile wpa_supplicant ubuntu 16 - LinuxTopic
Still didn't work.
This issue still exists and is happening to me as well. Has anyone figured this out by now?
flatpak run org.gnome.NetworkDisplays
Gtk-Message: 12:52:05.961: Failed to load module "canberra-gtk-module"
Gtk-Message: 12:52:05.962: Failed to load module "canberra-gtk-module"
(gnome-network-displays:2): Gnd-WARNING **: 12:52:06.076: Error calling DBus method during Screencast portal initialization: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.portal.ScreenCast” on object at path /org/freedesktop/portal/desktop
(gnome-network-displays:2): Gnd-WARNING **: 12:52:06.076: Error initializing screencast portal: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.portal.ScreenCast” on object at path /org/freedesktop/portal/desktop
(gnome-network-displays:2): Gnd-WARNING **: 12:52:06.076: Screencasting portal is unavailable! It is required to select the monitor to stream!
(gnome-network-displays:2): Gnd-WARNING **: 12:52:06.076: Falling back to X11! You need to fix your setup to avoid issues (XDG Portals and/or mutter screencasting support)!
I figured that this could be caused by the fact that the version of GNOME Network Displays is a flippin' flatpak - went into Synaptic and tried to install the -dev and force the Ubuntu version of xdg-desktop-portal which would have downgraded it to 1.6.0-1ubuntu2(focal-updates); but no joy because there was an error after hitting apply. Tried again later, and was able to complete this "downgrade" and used Synaptic to Lock Version. Retried Network Displays application and waited for my WiFi to crash again - it happened the same way. systemctl restart NetworkManager.service
lshw:
*-network
description: Wireless interface
product: Wi-Fi 6 AX201
vendor: Intel Corporation
physical id: 14.3
bus info: pci@0000:00:14.3
logical name: wlo1
version: 00
serial: ##:##:##:##:##:##
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress msix bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=5.15.0-71-generic firmware=66.f1c864e0.0 QuZ-a0-hr-b0-66.u ip=##.##.#.### latency=0 link=yes multicast=yes wireless=IEEE 802.11
It would be swell if we could get a look at this problem and find a fix, but all my searches ended up taking me to places where people were doing the same and coming up empty with regard to a fix. Lots of attempted workarounds, but the only workarounds that seemed to work are those which involved getting a Chromecast device or wiring up the PC with an HDMI and using a wireless keyboard - which I'm doing right now.
In fact, the only reason I came across this problem is because I couldn't find a reliable source which detailed how to set up whole-DESKTOP casting with Chromecast, not using a browser to cast a browser page... I want to use my TV as a second screen so I want to cast my entire desktop with mouse/audio/fps/resolution support. If Chromecast can actually do this, I have yet to find the way so I would also appreciate someone's input in that regard as well. Until then I will continue my search.
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