Haiku no longer detects USB printer (regression)

[vidrep]

hrev49910 x86_gcc2 Epson NX625 printer Printer was configured and working on Haiku, but with recent builds it is no longer detected. Alpha 4.1, which is on another partition, on same hard drive, is still working. So, it not a hardware related problem

[vidrep]

I will attempt to go back and find where the regression took place. I'll report back later with the results.

[vidrep]

I have narrowed down the regression to between hrev49811 (working) and hrev49824 (not working).

[pulkomandy]

Possibly related in this revision range are changes to the launch_daemon. Could it be that the print_server is not running properly?

[axeld]

That would be my assumption as well. How exactly does the problem manifest itself? Is the printer always plugged in, but you cannot print to it? Or how exactly does the problem manifest itself? But do you mean by "detection"?

[vidrep]

The printer is always plugged in, but it cannot now be added from "Preferences->Printers" as before. To illustrate, I have attached a screenshot from Alpha 4.1 and the latest nightly, showing the "Printers" dialog.

[phoudoin]

Looks more like print transport add-ons are not loaded anymore.

[phoudoin]

I would bet that the transport popup menu is empty because of this line:

​https://cgit.haiku-os.org/haiku/tree/src/preferences/printers/AddPrinterDialog.cpp#n342 ​https://cgit.haiku-os.org/haiku/tree/src/preferences/printers/Globals.cpp#n40

Which sounds like, indeed, we fail to start print_server.

[axeld]

Thanks, I'll have a look at it.

[vidrep]

Have you had an opportunity to have a look at this yet?

[axeld]

Fixed in hrev50005. It's only a workaround, as the actual fix is way more involved -- I'll open a new ticket for that.

[vidrep]

Tested with hrev50006 x86_gcc2 - working again! Thank you for the "fix". Now I can resume testing the bugs which remain.