Hello,
I am continually running into this issue. I have a Scientific Linux server with an HP printer attached to it. This machine is on a wireless network, as is a Vista Home Edition laptop (Toshiba Satelite). For months at a time, the printer works perfectly, without incident or loss of work, for jobs spooled from the laptop.
But every few months or so (sometimes weeks, it varies), the configuration stops working. Then I go through this drill of trying to figure out what the problem is, by testing for CUPS requests over wireshark, etc.
Usually, it turns out that I can ping the Linux server from the laptop, and I can reach the CUPS web interface from the laptop. But for some reason, the laptop cannot see the printer. I even try (several times usually) to remove and re-add the printer on the laptop.
I do not have Samba running on the server, and never have really (years ago I did run Samba on other Linux servers, but never needed it here). I do not wish to add Samba to the mix since printing from laptop worked previously without effort.
Wireshark does show ping and responses, and HTTP requests to the print web server, which I expect since those do work from the laptop. But I do not see CUPS requests or other packets for the printer.
I also checked that the firewall has the CUPS/IPP ports open, and made sure that I can print locally. Sometimes, I even reset the wireless router (that has cured it on one occasion!)
Why should this be so intermittent? I have not performed any upgrades here (other than the usual security updates for both Linux and the Windows laptop).
There are tons and tons of hits for this and very similar issues, but none of the solutions there work for me. And I have tried dozens of them (mostly ending up the same advice).
Sometimes rebooting Windows fixes it, but not this time. Resetting the wireless router did not fix it, and neither did removing and re-creating the device on Windows.
This is (intermittently) baffling and rather annoying.
I am continually running into this issue. I have a Scientific Linux server with an HP printer attached to it. This machine is on a wireless network, as is a Vista Home Edition laptop (Toshiba Satelite). For months at a time, the printer works perfectly, without incident or loss of work, for jobs spooled from the laptop.
But every few months or so (sometimes weeks, it varies), the configuration stops working. Then I go through this drill of trying to figure out what the problem is, by testing for CUPS requests over wireshark, etc.
Usually, it turns out that I can ping the Linux server from the laptop, and I can reach the CUPS web interface from the laptop. But for some reason, the laptop cannot see the printer. I even try (several times usually) to remove and re-add the printer on the laptop.
I do not have Samba running on the server, and never have really (years ago I did run Samba on other Linux servers, but never needed it here). I do not wish to add Samba to the mix since printing from laptop worked previously without effort.
Wireshark does show ping and responses, and HTTP requests to the print web server, which I expect since those do work from the laptop. But I do not see CUPS requests or other packets for the printer.
I also checked that the firewall has the CUPS/IPP ports open, and made sure that I can print locally. Sometimes, I even reset the wireless router (that has cured it on one occasion!)
Why should this be so intermittent? I have not performed any upgrades here (other than the usual security updates for both Linux and the Windows laptop).
There are tons and tons of hits for this and very similar issues, but none of the solutions there work for me. And I have tried dozens of them (mostly ending up the same advice).
Sometimes rebooting Windows fixes it, but not this time. Resetting the wireless router did not fix it, and neither did removing and re-creating the device on Windows.
This is (intermittently) baffling and rather annoying.