Seems this patch was added a while ago and should already be included in
the latest Jaunty release as well as the upcoming Karmic release.
Thanks.

ogasaw...@emiko:~/ubuntu-karmic$ git log -p 
82078234d4023c61b9d88e8be5e795423d17538e
commit 82078234d4023c61b9d88e8be5e795423d17538e
Author: Michael F. Robbins <[email protected]>
Date:   Fri May 16 23:48:42 2008 -0400

    USB: serial: ch341: New VID/PID for CH341 USB-serial
    
    Recent USB-serial devices using the WinChipHead CH340/CH341 chipset are
    being shipped with a new vendor/product ID code pair, but an otherwise
    identical device.  (This is confirmed by looking at INF for the included
    Windows driver.)
    
    Patch is tested and working, both with new and old devices.
    
    Signed-off-by: Michael F. Robbins <[email protected]>
    Signed-off-by: Greg Kroah-Hartman <[email protected]>

diff --git a/drivers/usb/serial/ch341.c b/drivers/usb/serial/ch341.c
index ba28fdc..1f7c86b 100644
--- a/drivers/usb/serial/ch341.c
+++ b/drivers/usb/serial/ch341.c
@@ -28,6 +28,7 @@ static int debug;
 
 static struct usb_device_id id_table [] = {
        { USB_DEVICE(0x4348, 0x5523) },
+       { USB_DEVICE(0x1a86, 0x7523) },
        { },
 };
 MODULE_DEVICE_TABLE(usb, id_table);


** Changed in: linux (Ubuntu)
       Status: New => Fix Released

-- 
USB to serial adapter HL-340 doesn't work
https://bugs.launchpad.net/bugs/235459
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