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Old 09-01-2003, 09:54 PM   #1
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Registered: Jul 2003
Distribution: RH9
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Question [EXPERT] USB UHCI Presario Io Address

After passing NOUSB at installation AND in LILO, there is still the need for USB. Further insmod of usb controllers hangs the system.
My lspci -vvx put out that my PCI device responsible for USB, 0:07.2, is using IRQ5 and IO Base 4 from 0x1800 to 0x181f
as at booting I put as parameter this:
reserve=0x1800,20 that is almost the same as nousb.
Of course rc.d (because of RH9) will try to start services for USB. and it will hang at loading usb controller.
Trying better reserve=0x1800,20 nousb will avoid loading the modules. BUT, and this is my big problem, at the login screen an with a blinking cursor (full graphical login) I don't have any keyboard or mouse (weird enough) I cannot be sure since I have no kbd or mouse, but I believe it didn't hung at this time.
Mouse is not USB, of course. A PS2 and the known Synapsis, nothing works reserving this addresses.
What can I do? How do I know which io address is my mouse using, if any (PS2 uses IRQ 12 under Windows but IOports???) I'm a newbie with Linux and laptops but not with computers. And the keyboard? /dev/psm0 is supposed to be the mouse in question, isn't? What is the symbol in /dev for a laptop keyboard.
How do I know the resources they are taking.
How can I change it. (setserial maybe?) Can I change it?
Or its better to use setpci and _move_ USB pci controller to another free address (how do I know the REAL free address under Linux) I tried this and it hung with ~ That's a kernel's hardware issue. Isn't?
If my line of thinking is correct (I presume it is) this could be a better and general solution than recompiling kernels, for newbies at least. Any ideas?
Worst case... editing usb.h or hub.h before compiling I suppose... HOW then?
Old 09-06-2003, 06:45 AM   #2
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I'm a bit confused... with the current hack, USB gets disabled and it doesn't register a ps/2 keyboard and mouse? Do you want USB support? If not, the easiest hack is just to move /lib/modules/2.4.20-blah/kernel/drivers/usb/uhci.o and re-run depmod -a and so kernel support will never get loaded... unless the punks built it into an initrd, which I hope they didn't... hrmm, or what's the make and model of the laptop? You might want to check the changelogs over at and see if 2.4.21 or 2.4.22 didn't take care of your problem? Also, the hang might get logged in /var/log/messages and have something useful to report.


Old 09-06-2003, 08:00 AM   #3
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Distribution: Distribution: RHEL 5 with Pieces of this and that. Kernel, KDE 3.5.8 and KDE 4.0 beta, Plu
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Edit your /etc/modules.conf file. ' # ' out any lines mentioning usb.

If mouse or keyboard does not work. Only load the usb-ohci and see what happens.

Is this a Redhat 9 install. If so and using the default 2.4.20-8 kernel. disable kudzu ' service --level 345 kudzu off ' . See what that does.

Good luck
Old 09-06-2003, 01:28 PM   #4
Registered: Jul 2003
Distribution: Kubuntu
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This seems to be a common problem with USB and RedHat.
When I installed SuSE 8.2 on a Compaq Presario 2170, I first disabled legacy USB support in the BIOS. The installation then went smoothly, and USB works as it should.
You might try disabling the legacy USB, and then see what happens when you don't pass the NO_USB in LILO.


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