Udev & hotplug USB troubles (mouse/memory stick)

Jefklak · l33t Joined: 26 Oct 2003 Posts: 818 Location: Belgium

Ok, this is for anti-spam reasons I wanted to create a new thread instead of going off-topic in the "udev got it working, now what" thread.

First problem
===============
Every f*cking time I restart /etc/init.d/hotplug or I restart/shutdown my computer the hotplug thing hangs :evil:

I'm really getting frustrated! "rmmod [usb module]" also crashes. I have no Idea why. I tried to compile every USB module into the kernel and now I can restart hotplug without crashing. Why? I don't even want to compile every thing into the kernel... ALSA did not work eighter, compiling into the kernel did. Huh?

Second problem
=================
Also, when plugging in my USB Stick, udev creates NOTHING. No sda thing, no modules loaded by hotplug, nothing. I solved this by compiling "usb_storage" INTO the kernel instead of making it a module. But I still would like to get a module... Anyway, as long as it works eh. Forget it. I plug it in, ok, I can even mount/read/edit, nice. I plug out, and replug, nothing. udev creates no /dev/sda(x?) device. Nothing nothing happens... Why?

Third problem
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Same prob with USB Mouse... Everything works the first time, not the second. HUH? When I compiled ehci_hcd, ohci_hcd and uhci_hcd as modules, my mouse loads the first time. I replug it into an usb port >> same prob as the usb stick; nothing happens... First time, second not.
I tried compiling EVERY module mentioned above into the kernel, but now my mouse does not work, not even the first time. Why the heck...?

Some clues
==============

Restarting or starting hotplug gives:

dsd · Posted: Tue Mar 16, 2004 9:26 pm Post subject:

first, thanks for splitting off the udev thread

which kernel are you running?

for your second problem, with usb_storage compiled as a module, which lines appear in dmesg when you plug the device in? does the "usb_storage" module get listed in "lsmod" at this stage?

third problem: please post the relevant dmesg output the right after the first time you plug it in, when you unplug it, and when you replug it. do the modules get auto loaded/unloaded at each stage? i have a feeling this is related to problem 1 - hotplug tries to unload the module when you unplug, but fails...

as for USBDEVFS - well, this was originally a "usb device file system". but the name usbDEVFS was confusing, as the system was in no way related to devfs. it is now known as "usbfs" and gets mounted at /proc/bus/usb. it is nothing to do with devfs, and it is usual that you have it in a udev-based system.
some of the code still includes functions with the name USBDEVFS, e.g. USBDEVFS_CONTROL - so you may see the word "usbdevfs" in error logs sometimes. it is really just usbfs.

what happened when you downgraded hotplug? did it fix any problems?
(it sounds like your issues here are kernel issues)

also, try running the current stable baselayout. i've heard some things about the masked version, which has put me off upgrading...
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agrippa_cash · Posted: Wed Mar 17, 2004 1:09 am Post subject:

My hotplug would freeze on shutdown when I booted with a scheduler instruction in Grub and then used a USB device. My boogey line was: elevator = cfq.

The reason for this is explained somewhere in one of the many ovlay-ourcesay threads.

I'm useing pig latin because I'm tired of getting all these extrainous threads when I'm searching for the newest ovlay-ourcesay.

Iay ishway atthay ethay earchsay unctionfay ouldway earchsay orfay ethay ewestnay ppearancay foay ethay equestedray ermtay (otnay ewestnay readthay ontainingcay iadsay ermtay).

Ighsay.

Jefklak · l33t Joined: 26 Oct 2003 Posts: 818 Location: Belgium

I'm running 2.6.4-mm1. I will try to update to love-sources, ck-sources or mm2 and see what happens, and I'll also try to downgrade my baselayout. Downgrading hotplug didn't solve anything...

When usb_storage was compiled as a module, nothing happened when I plugged it into my usb port. I tried loading usb_storage manually (that worked but I still couln't mount it because udev didnt create any devices). So I rmmod-ded the module and that resulted into a crash. :evil:

Agrippa_cash: i'm also using "elevator=cfq" with preemptive kernel support enabled. But I also have an 2.6.4-mm1 without preemptive kernel for testing and with that kernel hotplug also hangs. I noticed (as I said) when you compile most things in he complains less about stuff like

nevynxxx · Posted: Wed Mar 17, 2004 8:58 am Post subject:

I am also having the "only works the first time" thing going on. I seem to be getting kernel oopses when I unplug my stick, is there anything that should be done to tell the usb system you are unplugging? like in windows you have to stop the device? also is there a command that will check the usb tree and remove any devices that don't exist anymore?
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dsd · Posted: Wed Mar 17, 2004 1:52 pm Post subject:

try running kernel 2.6.4 vanilla.

-mm is full of experimental stuff and you can safely expect the odd screwup here and there (its not that common right now, but 2.6.4-mm1 was pretty much marked as a "dont use me" release by-description..)
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Jefklak · l33t Joined: 26 Oct 2003 Posts: 818 Location: Belgium

Ok, compiling right now.
I'm going to try agian making usb stuff modules.
I'll let you know if there's any progress in this...

Hah. compiled ehci-hcd, hid and ohci_hcd as MODULES and everything (at least my mouse) works fine with udev. usbcore & input still compiled in.

Jefklak · l33t Joined: 26 Oct 2003 Posts: 818 Location: Belgium

OW YEAH

Plug in, plug out.
Plug back in, plug back out.
Repeat and dance!!! :lol:

Thank you so much. Everything works as it has to, the only thing I did was changing kernel as you said... -mm sucks!

Only one little problem: I created a rule for my usb stick

dsd · Posted: Wed Mar 17, 2004 6:21 pm Post subject:

your USB mouse is usb 1.1 hardware. theres no way to force it to use USB2. you wouldnt gain anything even if you could.

however, if you have EHCI compiled in (or as a module), and you plug in a USB2-capable device, then yes, that device will use the USB2 capabilities.

the problem that you are having with your USB stick is that it creates more than one device node (e.g. sda _and_ sda1). sda is not mountable, sda1 is. the problem is that your rule matches both of those nodes, so it gets confused. you only want to be matching sda1.
add a key that says:
KERNEL="sd?1"
and it will work.

for more info, see my page on this topic. i detail this exact scenario on there (for my camera)
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Jefklak · l33t Joined: 26 Oct 2003 Posts: 818 Location: Belgium

Thank you very much dsd.
Anyway, i'm still running preemptive sheduling so that wasn't the problem. for people having the same problem as me: try another kernel! Nothing more, nothing less...

However, Mounting /dev/sda? (or the symlink) gives:

dsd · Posted: Wed Mar 17, 2004 7:25 pm Post subject:

ok, its probably a little different on your device then.
change the rule to
KERNEL="sd?"

i dont know about your X problem
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Jefklak · l33t Joined: 26 Oct 2003 Posts: 818 Location: Belgium

That works. Thanks

I'm so happy

MasquedAvenger · Posted: Fri Apr 30, 2004 4:08 pm Post subject:

By the way, I don't think you would want to do this, but you could actually run fdisk on your /dev/sda and create partitions, and even create any filesystems you want, just like a HD

James

drakos7 · Posted: Wed Aug 11, 2004 2:02 am Post subject:

bumping this thread because I also have the problem Jefklak experiences that the scroll functionality is lost when plugging the usb mouse back in. Anyone have any suggestions?
EDIT: using /dev/input/mice instead of /dev/input/mouse1 worked for me. Now I can plug and unplug with impunity. Woohoo! :twisted: