On 2/1/06, Alan Stern <[EMAIL PROTECTED]> wrote: > On Wed, 1 Feb 2006, Dmitry Torokhov wrote: > > > > The older Red Hat code triggers the USB handoff setup from the i8042 > > > setup at the point the i8042 appears to be talking through its backside. > > > Seems to be no reason for the non modular case the same cannot be done > > > now (or done for all cases if need be) > > > > > > > Quite often we need handoff even if i8042 seems to be OK otherwise and > > responds to basic queries - mostly on laptops where Synaptics/ALPS is > > not recognized until we perform do handoff. > > At the moment, it appears that there are some systems where you can't > communicate with the i8042 until after doing the USB handoff, and there > are other systems where you can't communicate with it before doing the > handoff. So it's a problem. >
FWIW I just had another example where i8042 is half alive/sane (reports supporting active multiplexing revision 1.9 but touchpad does not work). Using "usb-handoff" cures it (multiplexor revision 1.1 and everything is fine). BTW it's a SIS with EHCI/OHCI. > Maybe the best answer will be to add back the boot parameter, in a > "no-usb-handoff" form. Then people with buggy BIOSes would be able to > suppress the normal pre-i8042 handoff; the handoff wouldn't take place > until the USB host controller drivers were loaded. That ought to work if > those drivers are built as modules; I'm not sure it would work if they > were compiled into the kernel. > Having an option to disable handoff is a good idea. -- Dmitry ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642 _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
