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[Bug 1313981] [NEW] Kernel disabling serial port ttyS0 on boot

To: kernel-packages@xxxxxxxxxxxxxxxxxxx
From: Launchpad Bug Tracker <1313981@xxxxxxxxxxxxxxxxxx>
Date: Tue, 29 Apr 2014 03:16:00 -0000
Reply-to: Bug 1313981 <1313981@xxxxxxxxxxxxxxxxxx>
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You have been subscribed to a public bug:

On boot in 13.10 kern.log would state:

 Serial: 8250/16550 driver, 32 ports, IRQ sharing enabled
 00:0a: ttyS0 at I/O 0x3f8 (irq = 4) is a 16550A

and my serial modem would work just fine.

After upgrading to 14.04 the kernel log contains:

 Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
 serial 00:0a: disabled

How do I enable 00:0a?  Do I need to recompile the kernel with a
different config?

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: bot-comment
-- 
Kernel disabling serial port ttyS0 on boot
https://bugs.launchpad.net/bugs/1313981
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