Hi,
First I have to say that this is my first ever venue into Linux USB, so
I might ask rather stupid sounding questions.
Also let me start from the top explaning my problem / question.
I have an USB 2.0 printer (Canon i960), which is very fast printing via
USB 2.0 directly from Windows. I have now installed that one on my Linux
machine and exported as a raw printer via cups and Samba to the Windows
clients.
First I installed it as a USB 1.1 device, since my Linux machine didn't
have an USB 2.0 controller. That worked fine, but I wanted to get the
speed back.
So I bought an USB 2.0 controller, which also can be used to print but I
still don't have the speed of direct Windows printing.
So now I'm wondering if I can do something.
The system is vanilla RH9 (kernel 2.4.20-8).
The controller is a VIA controller:
[EMAIL PROTECTED] usb]# lspci -v | grep HCI
00:01.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (rev 01)
(prog-if 00 [UHCI])
00:0c.0 USB Controller: VIA Technologies, Inc. USB (rev 50) (prog-if 00
[UHCI])
00:0c.1 USB Controller: VIA Technologies, Inc. USB (rev 50) (prog-if 00
[UHCI])
00:0c.2 USB Controller: VIA Technologies, Inc. USB 2.0 (rev 51) (prog-if
20 [EHCI])
I did load the ehci-hcd module:
[EMAIL PROTECTED] usb]# lsmod | grep hci
ehci-hcd 18472 0 (unused)
usbcore 73088 1 [printer hid ehci-hcd]
Usbtree (found on the website) shows USB2:
[EMAIL PROTECTED] ~]# ./usbtree
/: Bus 01.Port 1: Dev 1, Class=root_hub,
Driver=ehci-hcd/4p, 480M
|__ Port 2: Dev 2, If 0,
Class=print, Driver=usblp, 480M
The usb devices also see the right things:
[EMAIL PROTECTED] usb]# more devices
T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=480 MxCh= 4
B: Alloc= 0/800 us ( 0%), #Int= 0, #Iso= 0
D: Ver= 2.00 Cls=09(hub ) Sub=00 Prot=01 MxPS= 8 #Cfgs= 1
P: Vendor=0000 ProdID=0000 Rev= 2.04
S: Manufacturer=Linux 2.4.20-8 ehci-hcd
S: Product=VIA Technologies, Inc. USB 2.0
S: SerialNumber=00:0c.2
C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr= 0mA
I: If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub
E: Ad=81(I) Atr=03(Int.) MxPS= 2 Ivl=256ms
T: Bus=01 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#= 2 Spd=480 MxCh= 0
D: Ver= 2.00 Cls=00(>ifc ) Sub=00 Prot=00 MxPS=64 #Cfgs= 1
P: Vendor=04a9 ProdID=1088 Rev= 1.05
S: Manufacturer=Canon
S: Product=i960
S: SerialNumber=4128ee
C:* #Ifs= 1 Cfg#= 1 Atr=c0 MxPwr= 2mA
I: If#= 0 Alt= 0 #EPs= 2 Cls=07(print) Sub=01 Prot=02 Driver=usblp
E: Ad=01(O) Atr=02(Bulk) MxPS= 512 Ivl=125us
E: Ad=82(I) Atr=02(Bulk) MxPS= 512 Ivl=0ms
But my print speed is the same with USB 1.1 and 2.0!
Any idea what I do wrong / could do to improove the speed.
Martin
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