linux-kernel - UART loses characters

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20081108005950.56fe267e@laptop.hypervisor.org>
Date:	Sat, 8 Nov 2008 00:59:50 +0100
From:	"Udo A. Steinberg" <udo@...ervisor.org>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: UART loses characters

Hi,

The serial connection of my T61 loses characters. Specifically when doing
something like:

cat somelargetextfile > /dev/ttyS0

I'm seeing the first characters of the file on the other side of the serial
line and then output stops. Transmission of characters resumes when keys are
pressed on the sender side or the trackpoint is moved. This seems to
indicate some interrupt problems on the sender side. I'm running 2.6.27 but
older 2.6. kernels show the same symptoms.

Any ideas how this can be debugged further?

Cheers,

	- Udo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/