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Groups > linux.debian.kernel > #50263

Bug#793377: linux-image-4.0.0-2-amd64: USB keyboard losing keystrokes

Cross-posted to 2 groups.

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Package: linux-image-4.0.0-2-amd64
Version: 4.0.8-1
Severity: important

Dear Maintainer,

I recently upgraded from Jessie to Stretch, which bought along a
kernel upgrade from 3.16 to 4.0. After the upgrade - and a reboot - my
USB keyboard (TypeMatrix 2030) started losing keystrokes: typing at
normal speed, about 25% of keys pressed were lost completely.

This happened under GNOME. I tried on the console, and couldn't
reproduce the problem (I didn't try typing fast, mind you). I couldn't
reproduce the problem with the built-in keyboard of my laptop (Dell
XPS 13, 2014 model), either.

I have not tried switching to another DE, or WM. But I did try
downgrading the kernel to 3.16, and my woes are now gone.

I have no idea how to debug the regression, any pointers in that
direction would be helpful. I can provide dmesg output and whatever
logs you may need, if told to do so.

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)


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Bug#793377: linux-image-4.0.0-2-amd64: USB keyboard losing keystrokes Gergely Nagy <algernon@madhouse-project.org> - 2015-07-23 15:10 +0200

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