usb-send-delay quirk documented

Author: alexpevzner

ipp-usb.8

@@ -1,6 +1,6 @@
 .\" generated with Ronn-NG/v0.10.1
 .\" http://github.com/apjanke/ronn-ng/tree/0.10.1
-.TH "IPP\-USB" "8" "December 2024" "" "ipp-usb.8"
+.TH "IPP\-USB" "8" "March 2025" "" "ipp-usb.8"
 .SH "NAME"
 \fBipp\-usb\fR \- Daemon for IPP over USB printer support
 .SH "DESCRIPTION"
@@ -304,18 +304,22 @@ Some enterprise\-level HP printers are known to have this problem\.
 .br
 How to reset device during initialization\. Default is \fBnone\fR
 .IP "\(bu" 4
-\fBinit\-timeout\fR = DELAY
+\fBinit\-timeout = DELAY\fR
 .br
 Timeout for HTTP requests send by the \fBipp\-usb\fR during initialization\.
 .IP "\(bu" 4
-\fBrequest\-delay\fR = DELAY
+\fBrequest\-delay = DELAY\fR
 .br
-Delay between subsequent requests\.
+Delay between subsequent HTTP requests, sent to device (this is not the same as \fBusb\-send\-delay\fR, which inserts delays between each subsequent USB send\-to\-device requests)\.
 .IP "\(bu" 4
 \fBusb\-max\-interfaces = N\fR
 .br
 Don't use more that N USB interfaces, even if more is available\.
 .IP "\(bu" 4
+\fBusb\-send\-delay = DELAY\fR
+.br
+Delay between low\-level USB send\-to\-device requests (this is not the same as \fBrequest\-delay\fR, which inserts delays between the whole HTTP\-level requests)\.
+.IP "\(bu" 4
 \fBzlp\-recv\-hack = true | false\fR
 .br
 Some enterprise\-level HP devices, during the initialization phase (which can last several minutes), may respond with an HTTP 503 status or similar, which is expected\. However, the response body may be truncated (typically, the terminating '\en' is lost)\. In such cases, \fBipp\-usb\fR will wait indefinitely for a response to maintain synchronization with the device\.

ipp-usb.8.md

@@ -371,7 +371,7 @@ The following parameters are defined:
      handles IPP request but returned status is not reliable. Affects
      only `ipp-usb` initialization.
 
-   * `init-delay = DELAY `<br>
+   * `init-delay = DELAY`<br>
      Delay, between device is opened and, optionally, reset, and the
      first request is sent to device.
 
@@ -391,15 +391,22 @@ The following parameters are defined:
    * `init-reset = none | soft | hard`<br>
      How to reset device during initialization. Default is `none`
 
-   * `init-timeout` = DELAY <br>
+   * `init-timeout = DELAY`<br>
      Timeout for HTTP requests send by the `ipp-usb` during initialization.
 
-   * `request-delay` = DELAY <br>
-     Delay between subsequent requests.
+   * `request-delay = DELAY`<br>
+     Delay between subsequent HTTP requests, sent to device (this is not
+     the same as `usb-send-delay`, which inserts delays between each
+     subsequent USB send-to-device requests).
 
    * `usb-max-interfaces = N`<br>
      Don't use more that N USB interfaces, even if more is available.
 
+   * `usb-send-delay = DELAY`<br>
+     Delay between low-level USB send-to-device requests (this is not
+     the same as `request-delay`, which inserts delays between the
+     whole HTTP-level requests).
+
    * `zlp-recv-hack = true | false`<br>
      Some enterprise-level HP devices, during the initialization phase
      (which can last several minutes), may respond with an HTTP 503