Bug: <valet stop in v2.4.4 (Linux Mint 22.2) fails to restore /etc/resolv.conf symlink, causing loss of Internet connectivity>

[tarcisiodev1]

Hello,

I have analyzed the behavior of valet stop in Valet-Linux version 2.4.4 and identified a bug related to DNS configuration reversion upon shutdown.

Basic info

Distro (Name and version)	PHP Version	Valet version
Linux Mint 22.2	8.3	2.4.4

• I've checked the issue queue and could not find anything similar to my bug.
• I'm on the latest version of valet-linux (valet --version): 2.4.4
• I've run valet fix and valet install after updating and before submitting my issue/feature.

What is the problem?

The valet-dns stop function does not revert the system's DNS configuration after shutting down DnsMasq. This failure to restore the original /etc/resolv.conf file causes a complete loss of external DNS resolution and Internet connectivity.

What was supposed to happen?

When executing valet stop, the system is expected to stop services (Nginx, PHP-FPM, DnsMasq) and, critically, the valet-dns stop script should revert the change to /etc/resolv.conf. This means restoring the original DNS file from the backup (/etc/resolv.conf.bak) and allowing the Network Manager/Systemd-resolved to take back control of public DNS resolution.

What actually happened?

1. valet stop shuts down DnsMasq and other services, as expected.
2. The valet-dns stop script fails to execute the necessary reversion logic.
3. The /etc/resolv.conf file remains a symlink pointing to the Valet-managed file ($VRESOLV).

Consequence: Since DnsMasq (which listens on 127.0.0.1) is inactive, the system attempts to resolve all domain names using an inactive local resolver, resulting in a complete loss of Internet connectivity.

How to reproduce this?

1. Install Valet-Linux v2.4.4 on Linux Mint 22.2.
2. Ensure Valet is running.
3. Execute valet stop.
4. Attempt to resolve a public address (e.g., ping google.com).

What is the solution?

The fix is likely needed within the valet-dns stop script to ensure the backup file (/etc/resolv.conf.bak) is correctly restored before the script exits.

Sources

Logs captured immediately after valet stop:

tjloq@tjloq-LOQ-15IAX9E:~$ valet start
Restarting php8.3-fpm...
Restarting nginx...
Restarting dnsmasq...
Valet services have been started.
tjloq@tjloq-LOQ-15IAX9E:~$ valet stop
Stopping php8.3-fpm...
Stopping nginx...
Stopping dnsmasq...
Valet services have been stopped.
tjloq@tjloq-LOQ-15IAX9E:~$ ls -l /etc/resolv.conf
lrwxrwxrwx 1 root root 28 out 27 21:31 /etc/resolv.conf -> /opt/valet-linux/resolv.conf

tjloq@tjloq-LOQ-15IAX9E:~$ ping -c 3 google.com
ping: google.com: Name or service not known

tjloq@tjloq-LOQ-15IAX9E:~$ systemctl status dnsmasq
○ dnsmasq.service - dnsmasq - A lightweight DHCP and caching DNS server
     Loaded: loaded (/usr/lib/systemd/system/dnsmasq.service; enabled; preset: >
     Active: inactive (dead) since Mon 2025-10-27 22:39:03 -03; 28s ago
   Duration: 5.414s
    Process: 12532 ExecStartPre=/usr/share/dnsmasq/systemd-helper checkconfig (>
    Process: 12538 ExecStart=/usr/share/dnsmasq/systemd-helper exec (code=exite>
    Process: 12544 ExecStartPost=/usr/share/dnsmasq/systemd-helper start-resolv>
    Process: 12805 ExecStop=/usr/share/dnsmasq/systemd-helper stop-resolvconf (>
   Main PID: 12543 (code=exited, status=0/SUCCESS)
      CPU: 55ms

Oct 27 22:38:58 tjloq-LOQ-15IAX9E dnsmasq[12543]: read /etc/hosts - 8 names
Oct 27 22:38:58 tjloq-LOQ-15IAX9E resolvconf[12551]: Dropped protocol specifier>
Oct 27 22:38:58 tjloq-LOQ-15IAX9E resolvconf[12551]: Failed to set DNS configur>
Oct 27 22:38:58 tjloq-LOQ-15IAX9E systemd[1]: Started dnsmasq.service - dnsmasq>
Oct 27 22:39:03 tjloq-LOQ-15IAX9E systemd[1]: Stopping dnsmasq.service - dnsmas>
Oct 27 22:39:03 tjloq-LOQ-15IAX9E resolvconf[12809]: Dropped protocol specifier>
Oct 27 22:39:03 tjloq-LOQ-15IAX9E resolvconf[12809]: Failed to revert interface>
Oct 27 22:39:03 tjloq-LOQ-15IAX9E dnsmasq[12543]: terminated upon receiving signal TERM
Oct 27 22:39:03 tjloq-LOQ-15IAX9E systemd[1]: dnsmasq.service: Deactivated succ>
Oct 27 22:39:03 tjloq-LOQ-15IAX9E systemd[1]: Stopped dnsmasq.service - dnsmasq>