new kvm usb troubles - help!
ted leslie
ted.leslie-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org
Wed Feb 23 23:50:37 UTC 2011
just dawned on me, if i can get an event to fire when usb subsystem
has a change, i can just get it to run this reset (below).
also the c program when run, it returns mouse to me immediate, it just
takes a few seconds to return to shell (so thats not an issue).
so falling a more elegant solution, if i can intercept a usb subsystem
change, and have to execute a script i write, i would
get what i want, all be it a super kludge.
tl
On Wed, Feb 23, 2011 at 6:38 PM, ted leslie <ted.leslie-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
> this program allows me to kick the usb device (reset) and this gives
> me back mouse control,
> but its not ideal because i have to run it each time i return to my
> linux pc (on kvm), and
> the device # in proc changes every time i port switch the kvm (it
> increments). I can lsusb to find it and
> then run the reset program below. The program below also take a couple
> of seconds to reset the usb and give
> me back mouse control. got to be a easier way, i.e. just don't allow
> it to accept the ATEN usb device period.
> hopefully someone will have an idea that works well.
>
> tl
>
> /* usbreset -- send a USB port reset to a USB device */
>
> #include <stdio.h>
> #include <unistd.h>
> #include <fcntl.h>
> #include <errno.h>
> #include <sys/ioctl.h>
>
> #include <linux/usbdevice_fs.h>
>
>
> int main(int argc, char **argv)
> {
> const char *filename;
> int fd;
> int rc;
>
> if (argc != 2) {
> fprintf(stderr, "Usage: usbreset device-filename\n");
> return 1;
> }
> filename = argv[1];
>
> fd = open(filename, O_WRONLY);
> if (fd < 0) {
> perror("Error opening output file");
> return 1;
> }
>
> printf("Resetting USB device %s\n", filename);
> rc = ioctl(fd, USBDEVFS_RESET, 0);
> if (rc < 0) {
> perror("Error in ioctl");
> return 1;
> }
> printf("Reset successful\n");
>
> close(fd);
> return 0;
> }
>
>
> On Wed, Feb 23, 2011 at 6:28 PM, ted leslie <ted.leslie-Re5JQEeQqe8AvxtiuMwx3w at public.gmane.org> wrote:
>> I just bought a 4 port dual view dual-dvi kvm from iogear 1644
>> The first bad but not surprising news is that the hot keys don't work,
>> i have to actually press the port select on the device to get it to
>> route my monitors to the selected computer. The reason for this is, my
>> keyboard and mouse is a all in one unit (single usb connect),
>> so it plugs to the usb peripherals jack on the kvm (this kvm switches
>> usb, audio, keyboard, mouse, and video),
>> but the device (confirmed by tech support call just now), only
>> recognized the hot key from the usb keyboard port (on kvm),
>> and not a keyboard on a generic usb (i.e. mine is keyboard mouse all in one).
>> But this isn't to bad provided i can place the unit wthin arms-fingers
>> reach (and i have another idea - more later).
>> (i worry however that over the years i may wear out buttons on the
>> devices console as apposed to using keyboard issued hot keys).
>>
>> The serious issue i have is, on the switch between ports (computers),
>> the usb devices are reoffered, but the order is problematic.
>> If i switch using the kvm, the mouse stops when i come back to my main
>> linux machine. If i physically unplug the usb at the computer (cable
>> between kvm and computer),
>> it comes back, and the device order is opposite (see below), if i
>> issue a soft usb reset from the hot keys (on a second keyboard into
>> the kvm in keyboard port)
>> it also works, but it doesn't work (usb device come up in opposite
>> order) if i use kvm port switch.
>> xinput shows the usbPS2 devices and ATEN but i can not get
>> xsetpointer of xinput set-pointer to work as device names are same ,
>> and if i use device # it fails as well.
>>
>> usb black list doesn't seem to help, because from what i see, it is
>> for modules only, and that doesn't work for me. I also tried removing
>> the hid usb module and reinserting
>> but this has it come up in the wrong order again :( it's odd that
>> depending on how i reset the usb bus, the order is consistently
>> different, i.e.:
>>
>> phyiscal usb cable in/out comes up with order i want,
>> kvm port switch not the right order,
>> kvm usb bus soft reset is right order,
>> linux module out/in wrong order.
>>
>>
>> SO, my question is, can i some how in linux control the order, or
>> better yet get it to not accept the ATEN device?
>>
>> Also, if i plug my mouse/keyboard combo into the dedicated keyboard or
>> mouse jack i (not so surprisingly) only get the one functionality,
>> but (ok maybe dumb question here), isn't a usb device a usb device? if
>> i plug my combo keyboard and mouse into the "keyboard kvm port",
>> why can't it intercept my keyboard strokes (for hot key detection),
>> and pass across whatever "mouse" data is on it too?
>>
>> If i can just get control over the usb device order (or blacklist
>> ATEN) i can fix this one issue, any suggestions?
>> b.t.w. the soft reset issued from the keyboard is a pain as it
>> involves a hold this, hold this, release, release, press type
>> pain-in-the-ass keyboard combination
>> (and i don't want to have to have a 2nd keyboard present just to issue
>> kvm hot key sequences).
>>
>> and on a really why out thought, could i get a usb port on my computer
>> to act as a keyboard usb device to the kvm?
>> i.e. connect a usb to usb cable from pc to kvm (in kvm dedicated
>> keyboard usb jack), and I can feed the usb data to
>> the kvm (not by a keyboard , but from a usb port on computer faking as
>> a keyboard)? (ok i did say "why out thought here!").
>>
>> the iogear 1644 kvm does however do the core piece i needed, which is
>> KVM for dual monitor dual-dvi two monitors ( at 2560x1600 res) to 3
>> or more (it can route upto 4 computers) to share the dual dual dvi
>> view set up.
>> unfortunately on the switching, the monitors (or is it the unit, i
>> don't know), its about a 1/3-2/3 of a second to switch between views,
>> which is a little disappointing (last i used a kvm on crt monitor,
>> monitor switching had no detectable switching lag, i am guessing the
>> dvi add some lag in the loop for some hand shaking or something).
>> I couldn't find any other kvm devices close to the 550$ price range of
>> this one, so not sure there are others that work better.
>> To solve the hot key issue, i may get a programmable keyboard
>> (hopefully find a cheap one), that i could program the port switch
>> keyboard sequence in a macro and get it to fire on a singe keypress,
>> but i have to solve the linux usb order detection issue first.
>>
>> below is dmesg , one where it works (notice order), and one where doesn't:
>> DOESNT WORK
>> [4814267.775320] input: ATEN CS1644 V1.2.11? as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.4/2-5.4:1.0/input/input103
>> [4814267.800288] generic-usb 0003:0557:2213.0063: input,hidraw2: USB
>> HID v1.00 Keyboard [ATEN CS1644 V1.2.11?] on
>> usb-0000:00:1d.7-5.4/input0
>> [4814267.820815] input: ATEN CS1644 V1.2.11? as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.4/2-5.4:1.1/input/input104
>> [4814267.852309] generic-usb 0003:0557:2213.0064: input,hidraw3: USB
>> HID v1.00 Mouse [ATEN CS1644 V1.2.11?] on usb-0000:00:1d.7-5.4/input1
>> [4814982.125905] usb 2-5.2: USB disconnect, address 46
>> [4814989.252313] usb 2-5.1: new low speed USB device using ehci_hcd
>> and address 48
>> [4814989.368340] usb 2-5.1: configuration #1 chosen from 1 choice
>> [4814989.371921] input: USBPS2 as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1:1.0/input/input105
>> [4814989.400282] generic-usb 0003:0D3D:0001.0065: input,hidraw0: USB
>> HID v1.00 Keyboard [USBPS2] on usb-0000:00:1d.7-5.1/input0
>> [4814989.404536] input: USBPS2 as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1:1.1/input/input106
>> [4814989.448434] generic-usb 0003:0D3D:0001.0066: input,hidraw1: USB
>> HID v1.00 Mouse [USBPS2] on usb-0000:00:1d.7-5.1/input1
>>
>>
>>
>> WORKS
>> [4815033.912365] input: USBPS2 as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1:1.0/input/input107
>> [4815033.936282] generic-usb 0003:0D3D:0001.0067: input,hidraw0: USB
>> HID v1.00 Keyboard [USBPS2] on usb-0000:00:1d.7-5.1/input0
>> [4815033.940429] input: USBPS2 as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.1/2-5.1:1.1/input/input108
>> [4815033.988347] generic-usb 0003:0D3D:0001.0068: input,hidraw1: USB
>> HID v1.00 Mouse [USBPS2] on usb-0000:00:1d.7-5.1/input1
>> [4815039.725105] usb 2-5.4: USB disconnect, address 47
>> [4815042.252326] usb 2-5.4: new low speed USB device using ehci_hcd
>> and address 50
>> [4815042.415105] usb 2-5.4: configuration #1 chosen from 1 choice
>> [4815042.435925] input: ATEN CS1644 V1.2.11? as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.4/2-5.4:1.0/input/input109
>> [4815042.460282] generic-usb 0003:0557:2213.0069: input,hidraw2: USB
>> HID v1.00 Keyboard [ATEN CS1644 V1.2.11?] on
>> usb-0000:00:1d.7-5.4/input0
>> [4815042.480161] input: ATEN CS1644 V1.2.11? as
>> /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.4/2-5.4:1.1/input/input110
>> [4815042.520317] generic-usb 0003:0557:2213.006A: input,hidraw3: USB
>> HID v1.00 Mouse [ATEN CS1644 V1.2.11?] on usb-0000:00:1d.7-5.4/input1
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