Bug#285017: kernel-image-2.4.27-1-686: upgrading from v2 to v6 slows down my modem

[Horms <horms@debian.org>]

severity 285017 important
package 285017 kernel-source-2.4.27
package 286402 kernel-source-2.4.27
merge 286402 285017
thanks

Hi,

these two bugs seem to be the same so I am merging them.

-- 
Horms

On Fri, Dec 10, 2004 at 12:44:50AM -0500, A Costa wrote:
> Package: kernel-image-2.4.27-1-686
> Version: 2.4.27-6
> Severity: normal
> 
> 
> I upgraded from 'kernel-image-2.4.27-1-686_2.4.27-2_i386.deb'
> to 'kernel-image-2.4.27-1-686_2.4.27-6_i386.deb', after which 
> my 56K external modem now tops off at about 1.5K a second, down
> from it's old 5.5K.  
> 
> When I downgrade to v2, the modem can do 5.5K again.  I tested this
> twice (with no other changes) to make sure.  Sure enough,
> downgrading the kernel seems to fix the modem, and upgrading
> it slows it down.
> 
> If it matters, the modem's connected to '/dev/ttyS0'.

[snip]

On Sun, Dec 19, 2004 at 07:34:12PM -0600, David wrote:
> Package: kernel-patch-debian-2.4.27
> Version: 2.4.27-6
> Severity: important
> 
> 
> I have just compiled kernel 2.4.27 with kernel-patch-2.4.27-6, using
> kernel-pkg.  I have a dialup connection with a 33.6 modem.  My normal
> speed is commonly 31K.  My previous kernel was 2.4 26-2,
> 
> With this new kernel, I'm only connecting at 9600 bps.  This has been
> consistent throughout the day.  Booting back into the .26 kernel
> immediately gets me back to 31-33K.
> 
> I don't know if this is something in the ppp part of the kernel or what,
> but I'm sure it has to do with the kernel because simply rebooting into
> a different kernel with no other changes immediately remedies the
> problem.

[snip]