i can not run gdm success, but have the problem too when run sddm.<br><br><br><br><br><div id="spnEditorSign_app">--<br>发自我的网易邮箱手机智能版</div>&lt;br/&gt;&lt;br/&gt;&lt;br/&gt;
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<br>-----&nbsp;Original&nbsp;Message&nbsp;-----
<br>From:&nbsp;"宋文武"&nbsp;&lt;iyzsong@outlook.com&gt;
<br>To:&nbsp;tumashu&nbsp;&lt;tumashu@163.com&gt;
<br>Cc:&nbsp;guix&nbsp;&lt;guix-devel@gnu.org&gt;
<br>Sent:&nbsp;Tue,&nbsp;22&nbsp;Feb&nbsp;2022&nbsp;15:58:40&nbsp;+0800
<br>Subject:&nbsp;Re:&nbsp;[bug]:&nbsp;xfce4:&nbsp;xfpm-power-backlight-helper&nbsp;&nbsp;alway&nbsp;let&nbsp;me&nbsp;input&nbsp;password.
<br>
<br>tumashu&nbsp;&nbsp;&lt;tumashu@163.com&gt;&nbsp;writes:
<br>
<br>&gt;&gt;At&nbsp;2022-02-22&nbsp;15:04:22,&nbsp;"宋文武"&nbsp;&lt;iyzsong@outlook.com&gt;&nbsp;wrote:
<br>&gt;&gt;
<br>&gt;&gt;&gt;tumashu&nbsp;&lt;tumashu@163.com&gt;&nbsp;writes:
<br>&gt;&gt;&gt;
<br>&gt;&gt;&gt;&gt;&nbsp;Hello:
<br>&gt;&gt;&gt;&gt;
<br>&gt;&gt;&gt;&gt;&nbsp;&nbsp;&nbsp;When&nbsp;I&nbsp;update&nbsp;my&nbsp;guix&nbsp;system&nbsp;today,&nbsp;I&nbsp;have&nbsp;found&nbsp;that&nbsp;run&nbsp;xfce4:&nbsp;xfpm-power-backlight-helper&nbsp;alway&nbsp;let&nbsp;me&nbsp;input&nbsp;password,&nbsp;&nbsp;how&nbsp;to&nbsp;avoid&nbsp;input&nbsp;password?
<br>&gt;&gt;&gt;
<br>&gt;&gt;&gt;No&nbsp;answer&nbsp;yet,&nbsp;my&nbsp;understand&nbsp;is&nbsp;that:
<br>&gt;&gt;&gt;
<br>&gt;&gt;&gt;1.&nbsp;xfpm-power-backlight-helper&nbsp;need&nbsp;to&nbsp;run&nbsp;with&nbsp;'pkexec'.
<br>&gt;&gt;&gt;2.&nbsp;'pkexec'&nbsp;will&nbsp;always&nbsp;ask&nbsp;for&nbsp;password&nbsp;unless&nbsp;some&nbsp;polkit&nbsp;rules&nbsp;allow
<br>&gt;&gt;&gt;&nbsp;&nbsp;&nbsp;the&nbsp;action.
<br>&gt;&gt;&gt;3.&nbsp;'/etc/polkit-1/actions/org.xfce.power.policy'&nbsp;allows&nbsp;the&nbsp;action,&nbsp;but&nbsp;its
<br>&gt;&gt;&gt;&nbsp;&nbsp;&nbsp;executable&nbsp;is&nbsp;something&nbsp;like
<br>&gt;&gt;&gt;&nbsp;&nbsp;&nbsp;'/gnu/store/vsnzjhjm37cd42w7vv7mxgy8hi8w6zi0-xfce4-power-manager-4.16.0/sbin/xfpm-power-backlight-helper'.
<br>&gt;&gt;&gt;&nbsp;&nbsp;&nbsp;
<br>&gt;&gt;&gt;So&nbsp;run&nbsp;'pkexec&nbsp;xfpm-power-backlight-helper'&nbsp;will&nbsp;ask&nbsp;for&nbsp;password&nbsp;while&nbsp;'pkexec&nbsp;/gnu/store/.../xfpm-power-backlight-helper'&nbsp;will&nbsp;not.
<br>&gt;&gt;
<br>&gt;&gt;no,&nbsp;&nbsp;need&nbsp;input&nbsp;password&nbsp;when&nbsp;run&nbsp;"pkexec&nbsp;/gnu/store/.../xfpm-power-backlight-helper"
<br>&gt;&gt;
<br>&gt;&gt;I&nbsp;do&nbsp;not&nbsp;run&nbsp;this&nbsp;command&nbsp;by&nbsp;hand,&nbsp;when&nbsp;I&nbsp;start&nbsp;xfce4&nbsp;with&nbsp;slim,&nbsp;&nbsp;a&nbsp;window&nbsp;pop&nbsp;and&nbsp;let&nbsp;me&nbsp;input&nbsp;password&nbsp;many&nbsp;time,
<br>&gt;&gt;when&nbsp;I&nbsp;press&nbsp;Fkey,&nbsp;&nbsp;ask&nbsp;password&nbsp;again.
<br>&gt;
<br>&gt;&nbsp;When&nbsp;I&nbsp;test&nbsp;gnome&nbsp;and&nbsp;mate,&nbsp;have&nbsp;no&nbsp;this&nbsp;problem.
<br>&gt;
<br>
<br>The&nbsp;policykit&nbsp;rule&nbsp;only&nbsp;allow&nbsp;"active"&nbsp;session,&nbsp;I&nbsp;guess&nbsp;slim&nbsp;may&nbsp;lack
<br>'elogind-service'&nbsp;support&nbsp;to&nbsp;be&nbsp;an&nbsp;"active"&nbsp;session.
<br>
<br>I&nbsp;have&nbsp;'elogind-service'&nbsp;and&nbsp;use&nbsp;'sx'&nbsp;to&nbsp;start&nbsp;xfce,&nbsp;no&nbsp;problem&nbsp;here...
<br>
<br>My&nbsp;~/.config/sx/sxrc:
<br>
<br>#!/bin/sh
<br>setxkbmap&nbsp;dvorak
<br>xsetroot&nbsp;-solid&nbsp;sienna&nbsp;-cursor_name&nbsp;cross
<br>
<br>exec&nbsp;dbus-run-session&nbsp;--&nbsp;startxfce4
<br>
<br>
<br>
<br>Hope&nbsp;this&nbsp;helps!
<br>