Bug 195491
| Summary: | Keyboard stop working after r274861 when kbdmux is disabled in kernel | ||
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| Product: | Base System | Reporter: | iron.udjin |
| Component: | kern | Assignee: | freebsd-bugs (Nobody) <bugs> |
| Status: | New --- | ||
| Severity: | Affects Only Me | CC: | emaste, luislupe, pierre |
| Priority: | --- | ||
| Version: | 10.1-STABLE | ||
| Hardware: | Any | ||
| OS: | Any | ||
| See Also: |
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=196512 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=194718 |
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Description
iron.udjin
2014-11-29 05:08:30 UTC
Is this still an issue after PR 196512 was resolved? Sorry, I meant PR 196512. This is also affecting me. I think it affects everybody that tries to disable kbdmux. I'm setting up a multiseat workstation for a couple of people, so I have to separate the two keyboards. But when disabling kbdmux, no keyboard is recognized by vt. And this is preventing me from using the multiseat configuration. I'm using FreeBSD 10-STABLE with kernel compilation of a few days ago. I'd be glad to know what is the workaround that is mentioned is last post. Same here on 10.2 With the help of other knowledgeable people, I've already narrowed the problem to either vt(4) or ukbd(4) as the causes of this problem. After disabling kbdmux either on /boot/device.hints or in /boot/loader.conf with: hint.kbdmux.0.disabled="1", I cannot type at the prompt login. Using sc(4), it's possible to type at the login. The steps I've taken: 1. Have an USB keyboard attached to the motherboard. The keyboard is a Logitech K120 with no multimedia keys, just a 105 key with PT layout. The keyboard works fine when kbdmux is not disabled, and works fine in every other computer/OS. No AT keyboard used. url of the keyboard: http://www.logitech.com/en-us/product/k120 I tried with different USB keyboards, the behavior is identical. 2. In /boot/loader.conf, have these lines added: ukbd_load="YES" hint.kbdmux.0.disabled="1" hint.atkbd.0.disabled="1" hint.atkbdc.0.disabled="1" I tried it with both *atkbd* lines commented in and out and the result is the same. 3. In /etc/rc.conf Placing either: kbdcontrol -k /dev/ukbd0 < /dev/console or keyboard="/dev/ukbd0" Has the same effect. Can type at the login prompt with sc(4), but not with vt(4). 4. After commenting the two atk lines in /boot/loader.conf, what I got from: # ll /dev/*kbd* crw------- 1 root wheel 0x34 18 Fev 14:34 /dev/atkbd0 lrwxr-xr-x 1 root wheel 6 18 Fev 14:34 /dev/kbd0@ -> atkbd0 lrwxr-xr-x 1 root wheel 5 18 Fev 14:34 /dev/kbd1@ -> ukbd0 crw------- 1 root wheel 0x81 18 Fev 14:34 /dev/ukbd0 It seems everything is fine here. 5. In /var/log/messages, there are these lines: # egrep -i -e 'kbd|keyb' messages Feb 18 14:34:58 leao kernel: module_register_init: MOD_LOAD (kbdmux, 0xffffffff805d4070, 0) error 6 Feb 18 14:34:58 leao kernel: atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0 Feb 18 14:34:58 leao kernel: atkbd0: <AT Keyboard> irq 1 on atkbdc0 Feb 18 14:34:58 leao kernel: kbd0 at atkbd0 Feb 18 14:34:58 leao kernel: atkbd0: [GIANT-LOCKED] Feb 18 14:34:58 leao kernel: ukbd0: <USB Keyboard> on usbus0 Feb 18 14:34:58 leao kernel: kbd1 at ukbd0 Feb 18 14:34:58 leao kernel: uhid0: <USB Keyboard> on usbus0 It seems there's an error 6 regarding kbdmux... But, the person responsible for kbdmux, Maksim Yevmenkin, told me that this error is ENXIO which makes sense because kbdmux is disabled. To avoid showing de error, one have to do one of: remove 'device kbdmux' from kernel config or use nodevice So, no problem from kbdmux. 6. # dmesg | grep kbd module_register_init: MOD_LOAD (kbdmux, 0xffffffff805d4070, 0) error 6 atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0 atkbd0: <AT Keyboard> irq 1 on atkbdc0 kbd0 at atkbd0 atkbd0: [GIANT-LOCKED] ukbd0: <USB Keyboard> on usbus0 kbd1 at ukbd0 Seems to look fine, too. 7. # kbdcontrol -i < /dev/ukbd0 kbd1: ukbd0, type:generic (0 This is normal too. ukbd is the default keyboard, i.e. only one that is available 8. BIOS has legacy USB enabled. Conclusion: As the same setup allows for typing in sc(4) and not in vt(4), and as nothing seems wrong with kbdmux, it must be a vt(4) or ukbd(4) bug. |
