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<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=406420311-18052006>Hi,</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=406420311-18052006></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=406420311-18052006>Our
application runs on Linux platform. Mobiles are connected to system USB
ports using hubs. The application communicates with these mobiles. We
modified the usb-serial.c driver under ....linux/drivers/usb/serial/
to suit our application. One functionality of the mobile which needs to be
supported by the application is Hardware reset( swith off the mobile and switch
it on again).</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=406420311-18052006></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=406420311-18052006>The
kernel version being used is 2.6.16.13. Automated Hardware reset tests on 2
mobiles for 200 iterations were successful. But when tried the same tests
with 4 mobiles, sometimes it was successful and sometimes the mobiles are
getting disconnected after 30-40 iterations of tests. In case of mobile
disconnection, physically mobiles are in proper state, but the core is not able
to detect the mobiles (the mobiles are not listed in " /proc/bus/usb/devices"),
but the hubs are still detected.</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=406420311-18052006></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=406420311-18052006>An
observation is, when the disconnection problem is observed, unplugging and
plugging back the cable from system USB port is helping to get back the
devices. </SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=406420311-18052006></SPAN></FONT> </DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN class=406420311-18052006>Error
messages observed in /var/log/messages are:</SPAN></FONT></DIV>
<DIV><FONT face=Arial color=#0000ff size=2><SPAN
class=406420311-18052006></SPAN></FONT> </DIV>
<DIV><FONT size=2><SPAN class=406420311-18052006>
<DIV
style="mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly">
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<TD
style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 9pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 9pt; PADDING-BOTTOM: 0in; BORDER-LEFT: #ece9d8; PADDING-TOP: 0in; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent"
vAlign=top align=left>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT size=2><FONT
color=#0000ff><STRONG>usb 1-1.1.1: khubd timed out on ep0in
len=0/64<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office"
/><o:p></o:p></STRONG></FONT></FONT></SPAN></P></TD></TR></TBODY></TABLE></DIV>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT face=Arial color=#0000ff
size=2><STRONG></STRONG></FONT></SPAN> </P>
<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT size=2><FONT
color=#0000ff><STRONG><SPAN class=406420311-18052006> </SPAN>usb
1-1.1.1: khubd timed out on ep0out
len=0/0<o:p></o:p></STRONG></FONT></FONT></SPAN></P>
<DIV
style="mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly">
<TABLE cellSpacing=0 cellPadding=0 align=left vspace="0" hspace="0">
<TBODY>
<TR>
<TD
style="BORDER-RIGHT: #ece9d8; PADDING-RIGHT: 9pt; BORDER-TOP: #ece9d8; PADDING-LEFT: 9pt; PADDING-BOTTOM: 0in; BORDER-LEFT: #ece9d8; PADDING-TOP: 0in; BORDER-BOTTOM: #ece9d8; BACKGROUND-COLOR: transparent"
vAlign=top align=left>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT size=2><FONT
color=#0000ff><STRONG>usb 1-1.1.1: device descriptor read/64, error
-110<o:p></o:p></STRONG></FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT size=2><FONT
color=#0000ff><STRONG>usb 1-1.1.2: device not accepting address 127, error
-110<o:p></o:p></STRONG></FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT size=2><FONT
color=#0000ff><STRONG><SPAN class=406420311-18052006>hub </SPAN>1-1.1:1.0:
port 1 not enabled, trying reset
again...<o:p></o:p></STRONG></FONT></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT color=#0000ff
size=2><STRONG>hub 1-1.1:1.0: Cannot enable port 1. Maybe the USB cable is
bad?</STRONG></FONT></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><FONT color=#0000ff
size=2></FONT></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><SPAN
class=406420311-18052006><FONT color=#0000ff><FONT size=2>Please share
your ideas to solve this issue</FONT>. </FONT></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><SPAN
class=406420311-18052006><FONT
color=#0000ff></FONT></SPAN></SPAN> </P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><SPAN
class=406420311-18052006><FONT color=#0000ff size=2>Thanks &
Regards,</FONT></SPAN></SPAN></P>
<P class=MsoNormal
style="MARGIN: 0in 0in 0pt; mso-element: frame; mso-element-frame-hspace: 9.0pt; mso-element-wrap: around; mso-element-anchor-vertical: paragraph; mso-element-anchor-horizontal: margin; mso-element-left: 23.4pt; mso-element-top: 30.4pt; mso-height-rule: exactly; mso-layout-grid-align: none"><SPAN
style="FONT-SIZE: 11pt; FONT-FAMILY: Arial"><SPAN
class=406420311-18052006><FONT color=#0000ff
size=2>Sreevidya</FONT></SPAN></SPAN></P></TD></TR></TBODY></TABLE></DIV></SPAN></FONT></DIV></FONT></DIV></BODY></HTML>