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    SubjectRe: [ANNOUNCE] udev 015 release
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    Date
    On Fri, 2004-01-30 at 18:45, Prakash K. Cheemplavam wrote:
    > Hi Greg,
    >
    > perhaps you remember me being a gentoo user wanting to switch to udev.
    > Well I did so, but am having some problems:
    >
    > 1.) Minor one: Nodes for Nvidia (I am using binary display modules
    > 1.0.5328) ar not created. I have to do it by hand each start-up (written
    > into loacal.start.):
    > mknod /dev/nvidia0 c 195 0
    > mknod /dev/nvidiactl c 195 255
    >

    What version baselayout? Unstable use a tarball to save device nodes
    ...

    > 2.) More probelmatic: I am having some serious troubles with my Epson
    > Perfection USB scanner:
    > a) I am to dumb to write a rule for it to map it to /dev/usb/scanner0
    >
    > Excerp of lsusb -v:
    >
    > Bus 001 Device 004: ID 04b8:010f Seiko Epson Corp. Perfection 1250
    > Device Descriptor:
    > bLength 18
    > bDescriptorType 1
    > bcdUSB 1.10
    > bDeviceClass 255 Vendor Specific Class
    > bDeviceSubClass 0
    > bDeviceProtocol 255
    > bMaxPacketSize0 8
    > idVendor 0x04b8 Seiko Epson Corp.
    > idProduct 0x010f Perfection 1250
    > bcdDevice 1.00
    > iManufacturer 1 EPSON
    > iProduct 2 EPSON Scanner 010F
    > iSerial 0
    > bNumConfigurations 1
    >
    > I don't exactly know which SYSFS_ field to use as the don't match the
    > lsusb descriptor. I tried various ones, but the scanner always gets
    > mapped to /dev/scanner0. I managed to get my HP printer to be mapped to
    > usb/lp0 by using its serial. This is my (latest non working )line for
    > the scanner:
    >
    > BUS="usb", SYSFS_model="Perfection 1250", NAME="usb/scanner0"
    >
    > Now the serious issue: When rebooting or disconnecting the scanner I get
    > a kernel oops:
    >
    > hub 1-0:1.0: new USB device on port 2, assigned address 4
    > drivers/usb/image/scanner.c: USB scanner device (0x04b8/0x010f) now
    > attached to usb/scanner0
    > drivers/usb/core/usb.c: registered new driver usbscanner
    > drivers/usb/image/scanner.c: 0.4.16:USB Scanner Driver
    > usb 1-2: USB disconnect, address 4
    > Unable to handle kernel NULL pointer dereference at virtual address 0000001e
    > printing eip:
    > f9b370cc
    > *pde = 00000000
    > Oops: 0000 [#1]
    > CPU: 0
    > EIP: 0060:[<f9b370cc>] Tainted: PF
    > EFLAGS: 00010282
    > EIP is at disconnect_scanner+0x2c/0x6d [scanner]
    > eax: f685f0c0 ebx: f685f0d4 ecx: f9b370a0 edx: 00000007
    > esi: 00000000 edi: f73194e8 ebp: f9b3abfc esp: f78c3e50
    > ds: 007b es: 007b ss: 0068
    > Process khubd (pid: 983, threadinfo=f78c2000 task=f78da720)
    > Stack: f685f0c0 f9b3ac78 f685f0c0 f9b3ace0 f9a4611b f685f0c0 f685f0c0
    > f685f100
    > f685f0d4 f9b3ad00 c026c214 f685f0d4 f685f100 f73194fc f73194c0
    > f9b36a4f
    > f685f0d4 f685f0c0 f73194fc f9b3ac0c 00000000 00000000 c021cbf8
    > f73194fc
    > Call Trace:
    > [<f9a4611b>] usb_unbind_interface+0x7b/0x80 [usbcore]
    > [<c026c214>] device_release_driver+0x64/0x70
    > [<f9b36a4f>] destroy_scanner+0x4f/0xb0 [scanner]
    > [<c021cbf8>] kobject_cleanup+0x98/0xa0
    > [<f9a4611b>] usb_unbind_interface+0x7b/0x80 [usbcore]
    > [<c026c214>] device_release_driver+0x64/0x70
    > [<c026c345>] bus_remove_device+0x55/0xa0
    > [<c026b27d>] device_del+0x5d/0xa0
    > [<f9a4c6af>] usb_disable_device+0x6f/0xb0 [usbcore]
    > [<f9a46b76>] usb_disconnect+0x96/0xf0 [usbcore]
    > [<f9a492df>] hub_port_connect_change+0x30f/0x320 [usbcore]
    > [<f9a48c13>] hub_port_status+0x43/0xb0 [usbcore]
    > [<f9a495ba>] hub_events+0x2ca/0x340 [usbcore]
    > [<f9a4965d>] hub_thread+0x2d/0xf0 [usbcore]
    > [<c010925e>] ret_from_fork+0x6/0x14
    > [<c011c9e0>] default_wake_function+0x0/0x20
    > [<f9a49630>] hub_thread+0x0/0xf0 [usbcore]
    > [<c0107289>] kernel_thread_helper+0x5/0xc
    >
    > Code: 80 7e 1e 00 75 2e 85 f6 74 17 8d 46 3c 8b 5c 24 08 8b 74 24
    >
    >
    > And that's it. I cannot do a clean shut-down anymore, as the scanner
    > module won't get unloaded. Is this an udev issue or is the module
    > faulty? I am using latest Linus kernel 2.6.2-rc2.
    >
    > Other than that I am quite impressed by udev. I disabled the use of an
    > archive saving all the nodes. This was getting on my nerves with a
    > former udev release as populating /dev took several seconds. Now I
    > cannot see any delay. Very well!
    >
    > bye,
    >
    > Prakash
    > -
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    Martin Schlemmer
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