[Bug 12070] Compaq 1850R crash during install and while running

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Ubuntu | linux





------- Additional Comments From matt at eisgr.com  2005-06-22 13:55 UTC -------
Is there an equivalent "nousb" kernel parameter to disable USB usage?  nousb has
worked with other distributions such as SuSE and RedHat.  This could potentially
explain the issue.  I'll have to check, but IIRC I removed USB from hotplug when
this first started happening.

I do apologize for the miscommunication.  base-config is allowed to run, and I
can't tell you how far it proceeds.  I see packages selected and I believe
downloaded (perhaps only some?) before locking up.  It's been difficult to tell
since the screen blanks leaving no trace of state.  The reason I was able to
gather more information this last time around is because I had SSHed in, thus
providing a terminal which didn't die blank.

Thanks for the acpi=off comment.  I now recall this as the correct syntax from
before.  It's been a while since I've had to turn off acpi or apm on a box,
which says a lot for Linux and hardware these days since I run Linux on laptops
all day!

<long pause, say 3 hours while driving to work and testing...>

Well, attempting all of the above, and additionally changing from "ati" to
"vesa" in the X config, here is the resolution:
Issue:  Compaq 1850's continue to have USB issues with Linux and the disabling
technique does not apply to Ubuntu.

Resolution: 
* Add the following to /etc/hotplug/blacklist: uhci_hcd 
* Comment out both "usbcore" lines in /etc/modprobe.d/aliases

$ grep usbcore /etc/modprobe.d/aliases
#alias char-major-180 usbcore
#alias usbdevfs usbcore


$ grep -B4 uhci_hcd /etc/hotplug/blacklist
# uhci ... usb-uhci handles the same pci class
usb-uhci
# usbcore ... module is loaded implicitly, ignore it otherwise
usbcore
uhci_hcd



#evbug is a debug tool and should be loaded explicitly
evbug


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