Cosmic screenshot does not work when having PAM enabled.

[MartianInGreen]

When using cosmic screenshot on a system with PAM (and fprintd) enabled the program always crashes with:

thread 'main' panicked at src/main.rs:69:10:
failed to send screenshot request: Zbus(MethodError(OwnedErrorName(ErrorName(Str(Owned("org.freedesktop.DBus.Error.UnknownMethod")))), Some("No such interface “org.freedesktop.portal.Screenshot” on object at path /org/freedesktop/portal/desktop"), Msg { type: Error, sender: UniqueName(Str(Borrowed(":1.48"))), reply-serial: 17, body: Signature("s") }))
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

This is regardless of the actual login method used for first login, so happens both when login in with a fingerprint and password as long as the option to login with a fingerprint is enabled (but failed).

[eduardz1]

I seem to have a similar problem

thread 'main' panicked at src/main.rs:69:10:
failed to send screenshot request: Zbus(MethodError(OwnedErrorName(ErrorName(Str(Owned("org.freedesktop.DBus.Error.UnknownMethod")))), Some("No such interface “org.freedesktop.portal.Screenshot” on object at path /org/freedesktop/portal/desktop"), Msg { type: Error, sender: UniqueName(Str(Borrowed(":1.77"))), reply-serial: 17, body: Signature("s") }))
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

It might be related due to having modified the /etc/greetd/cosmic-greeter.toml file to enable automatic login at boot:

[terminal]
vt = "1"

[general]
service = "cosmic-greeter"

[default_session]
command = "cosmic-comp systemd-cat -t cosmic-greeter cosmic-greeter"
user = "cosmic-greeter"

[initial_session]
command = "cosmic-session"
user = "eduard"

[MartianInGreen]

Ah yeah that's a good idea, here is my /etc/pam.d/cosmic-greeter

# Account management.
account required /nix/store/m5mhqggiq2pgq0q92pw8lwzilk08kary-linux-pam-1.6.1/lib/security/pam_unix.so # unix (order 10900)

# Authentication management.
auth sufficient /nix/store/znz29vh4d4a3vswpzkh4v7izz28g18m6-fprintd-1.94.3/lib/security/pam_fprintd.so # fprintd (order 11400)
auth sufficient /nix/store/m5mhqggiq2pgq0q92pw8lwzilk08kary-linux-pam-1.6.1/lib/security/pam_unix.so likeauth try_first_pass # unix (order 11600)
auth required /nix/store/m5mhqggiq2pgq0q92pw8lwzilk08kary-linux-pam-1.6.1/lib/security/pam_deny.so # deny (order 12400)

# Password management.
password sufficient /nix/store/m5mhqggiq2pgq0q92pw8lwzilk08kary-linux-pam-1.6.1/lib/security/pam_unix.so nullok yescrypt # unix (order 10200)

# Session management.
session required /nix/store/m5mhqggiq2pgq0q92pw8lwzilk08kary-linux-pam-1.6.1/lib/security/pam_env.so conffile=/etc/pam/environment readenv=0 # env (order 10100)
session required /nix/store/m5mhqggiq2pgq0q92pw8lwzilk08kary-linux-pam-1.6.1/lib/security/pam_unix.so # unix (order 10200)
session required /nix/store/m5mhqggiq2pgq0q92pw8lwzilk08kary-linux-pam-1.6.1/lib/security/pam_limits.so conf=/nix/store/d5jz0d6fnf0v2gz6hzhy290lsmk1ggcj-limits.conf # limits (order 12200)

[MartianInGreen]

This is actually really annoying because Cosmic also doesn't support wlr screencopy so rn there is just absolutely no way for me to take screenshots...

[MartianInGreen]

I don't actually think this is a cosmic-screenshot issue but rather a cosmic-comp issue since apparently the org.freedesktop.portal.Screenshot portal just doesn't exist.

[eduardz1]

Yeah other screenshot app also fail. Btw in my case it's sufficient to just log in and out to fix this behaviour

[MartianInGreen]

Sadly that doesn't work for me since I just log in the same way with a finger print and it just fails the same way. Had to disable fingerprint for now :/