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Am Sun, 16 Aug 2015 09:45:52 -0700 |
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schrieb walt <w41ter@×××××.com>: |
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|
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> I've been seeing this keyboard problem for the past few weeks: after |
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> running some command from a bash prompt (haven't tried zsh yet) the |
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> keyboard stops working. Almost like somebody unplugged the keyboard |
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> from its usb port (except that the LED on the keyboard stays lit so I |
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> know the power is still on). |
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> |
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> There are no error messages in journalctl or in /var/log/Xorg.0.log |
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> |
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> I don't know how to change to a console without using a ctrl-alt-Fn |
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> keystroke from the keyboard (anyone know if it's possible?). |
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> |
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> When I unplug the keyboard from the usb port I can see the kernel |
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> recognize the unplug event, which makes me think that it's not a |
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> kernel/usb bug or a broken wire in the keyboard cable. |
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> |
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> When I re-plug the keyboard into a usb port the keyboard immediately |
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> starts working normally again until the next time I happen to trigger |
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> the problem by running some black-magical command from a command |
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> prompt. There is no particular command that causes it--it can be any |
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> arbitrary command AFAICT. |
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> |
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> Just one weird example: I can be typing a URL in a web browser window |
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> when a bash command finishes running in a terminal window and the |
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> keyboard stops working in the middle of my typing :( |
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> |
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> Any debugging suggestions would be most welcome. |
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|
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I don't think you mention precisely which (type of) keyboard you use within |
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this thread (please forgive me if I overlooked it). Does it happen to be a |
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Logitech "Unifying Receiver" model? My experience with the one I have is that |
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the relative position and orientation of the keyboard to the receiver can |
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strongly affect its reliability. Specifically, when the orientation is "bad", |
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the keyboard will stop working intermittently (workarounds included moving the |
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keyboard, but that never helped permanently). Moving the receiver to a USB slot |
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in the side of the desktop case (as opposed to one in the back), thus changing |
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its orientation by 90°, made the keyboard perform reliably again. |
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|
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(My suspicion is that the directionality of the receiver and/or keyboard is not |
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uniform, though I can also imagine that the problem is (also?) caused by |
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interference with WLAN or something like that.) |
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|
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HTH |
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-- |
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Marc Joliet |
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-- |
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"People who think they know everything really annoy those of us who know we |
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don't" - Bjarne Stroustrup |
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