![打印对话框没有双面](https://linux22.com/image/1185234/%E6%89%93%E5%8D%B0%E5%AF%B9%E8%AF%9D%E6%A1%86%E6%B2%A1%E6%9C%89%E5%8F%8C%E9%9D%A2.png)
我有一台支持双面打印的网络打印机
> lpoptions -p printer-name -l | grep Du
HPOption_Duplexer/Duplex Unit: *True False
Duplex/2-Sided Printing: None *DuplexNoTumble DuplexTumble
我可以通过传递正确的选项进行双面打印
> lp -d "printer-name" -n 1 -o portrait -o media=a4 -o sides=two-sided-long-edge ~/Downloads/mypdf.pdf
但是,我的系统上的打印对话框(例如 Evince 或 Firefox)不显示此特定打印机的双面打印选项(其他打印机的双面打印选项显示正确)。打印对话框的选项从哪里获取?有没有办法强制显示双面打印?
> lpstat -t | grep printer-name
device for printer-name: socket://printer-name
cps1cm3 accepting requests since Tue 18 Jan 2022 11:58:31 GMT
printer printer-name now printing printer-name-0. enabled since Tue 18 Jan 2022 11:58:31 GMT