I'm currently trying out Cosmic on Fedora 40 installed via the COPR. While I know that this is not officially packaged, this might still help to find bugs.
On my device, the screen regularly goes completely black while using the desktop. There's not really a pattern to the issue, although I feel like a lot of times it happens when e.g. opening an applet or an applet spawns a new window, like the log-out prompt. The only way to get back output I was able to find so far is switching to a different TTY and then back.
I have a little journal output here, somewhere in this log the issue happened, although I can't say what specifically is just noise and what might be related.
What might be related, it's a laptop, and I'm using 175% scaling with a 90 Hz display
May 16 16:41:52 device dbus-broker[3173]: A security policy denied :1.564 to send method call /org/freedesktop/NetworkManager/Settings:org.freedesktop.NetworkManager.Settings.LoadConnections to org.freedesktop.NetworkManager.
May 16 16:41:53 device wpa_supplicant[3734]: wlp0s20f3: Reject scan trigger since one is already pending
May 16 16:42:11 device kernel: i915 0000:00:02.0: [drm] *ERROR* CPU pipe A FIFO underrun: port,transcoder,
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/ldac
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSink/aac
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/aac
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSink/sbc
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/sbc
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSink/sbc_xq
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/sbc_xq
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/faststream
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/faststream_duplex
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSink/opus_05
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/opus_05
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSink/opus_05_duplex
May 16 16:42:19 device bluetoothd[3177]: Endpoint unregistered: sender=:1.584 path=/MediaEndpoint/A2DPSource/opus_05_duplex
May 16 16:42:19 device rtkit-daemon[3194]: Successfully made thread 109616 of process 109614 (/usr/bin/pw-cat) owned by '1000' RT at priority 20.
May 16 16:42:19 device uresourced[3701]: Setting resources on user-1000.slice (MemoryMin: 0, MemoryLow: 0, CPUWeight: 100, IOWeight: 100)
May 16 16:42:19 device uresourced[3701]: Setting resources on user@1000.service (MemoryMin: 0, MemoryLow: 0, CPUWeight: 100, IOWeight: 100)
May 16 16:42:19 device uresourced[3701]: Setting resources on user.slice (MemoryMin: 0, MemoryLow: 0, CPUWeight: -, IOWeight: -)
May 16 16:42:20 device gdm[3615]: GLib: Source ID 197 was not found when attempting to remove it
May 16 16:42:20 device uresourced[3701]: Setting resources on user.slice (MemoryMin: 262144000, MemoryLow: 0, CPUWeight: -, IOWeight: -)
May 16 16:42:20 device uresourced[3701]: Setting resources on user-1000.slice (MemoryMin: 262144000, MemoryLow: 0, CPUWeight: 500, IOWeight: 500)
May 16 16:42:20 device uresourced[3701]: Setting resources on user@1000.service (MemoryMin: 262144000, MemoryLow: 0, CPUWeight: 500, IOWeight: 500)
May 16 16:42:20 device wireplumber[105800]: org.bluez.GattManager1.RegisterApplication() failed: GDBus.Error:org.bluez.Error.AlreadyExists: Already Exists
May 16 16:42:20 device bluetoothd[3177]: src/gatt-database.c:database_add_chrc() Failed to create characteristic entry in database
May 16 16:42:20 device bluetoothd[3177]: src/gatt-database.c:database_add_service() Failed to add characteristic
May 16 16:42:20 device bluetoothd[3177]: src/gatt-database.c:database_add_app() Failed to add service
May 16 16:42:20 device bluetoothd[3177]: src/gatt-database.c:client_ready_cb() Failed to create GATT service entry in local database
May 16 16:42:20 device wireplumber[105800]: org.bluez.GattManager1.RegisterApplication() failed: GDBus.Error:org.bluez.Error.Failed: Failed to create entry in database
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/ldac
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSink/aac
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/aac
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSink/sbc
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/sbc
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSink/sbc_xq
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/sbc_xq
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/faststream
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/faststream_duplex
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSink/opus_05
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/opus_05
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSink/opus_05_duplex
May 16 16:42:20 device bluetoothd[3177]: Endpoint registered: sender=:1.586 path=/MediaEndpoint/A2DPSource/opus_05_duplex
May 16 16:42:20 device rtkit-daemon[3194]: Successfully made thread 109677 of process 109675 (/usr/bin/pw-cat) owned by '1000' RT at priority 20.
May 16 16:42:21 device cosmic-comp[105940]: Failed to destroy old mode property blob: No such file or directory (os error 2)
I'm currently trying out Cosmic on Fedora 40 installed via the COPR. While I know that this is not officially packaged, this might still help to find bugs.
On my device, the screen regularly goes completely black while using the desktop. There's not really a pattern to the issue, although I feel like a lot of times it happens when e.g. opening an applet or an applet spawns a new window, like the log-out prompt. The only way to get back output I was able to find so far is switching to a different TTY and then back.
I have a little journal output here, somewhere in this log the issue happened, although I can't say what specifically is just noise and what might be related.
What might be related, it's a laptop, and I'm using 175% scaling with a 90 Hz display