parallel port problems with 2.6.21_rc5 and 2.6.21_rc6_git3-20070410174235

parallel port problems with 2.6.21_rc5 and 2.6.21_rc6_git3-20070410174235

[Markus Koßmann]

When using either the unpatched  2.6.21_rc5   or SUSEs patched 
2.6.21_rc6_git3-20070410174235 on a SUSE-10.2 x86_64 system the parallel port 
doesn't work right. If I "cat some_asciifile >/dev/lp0"  the output on my 
Epson Stylus Color 880 is unreadable.  "cat /dev/zero >/dev/lp0"  creates 
random characters on the paper. Printing using cups also doesn't work any 
more. 
Switching back to SUSEs  2.6.18.8-0.1 kernel fixes the problem.
Any Ideas, what might be broken here ? 

Re: parallel port problems with 2.6.21_rc5 and 2.6.21_rc6_git3-20070410174235

[Randy Dunlap]

On Wed, 11 Apr 2007 20:40:23 +0200 Markus Koßmann wrote:

> When using either the unpatched  2.6.21_rc5   or SUSEs patched 
> 2.6.21_rc6_git3-20070410174235 on a SUSE-10.2 x86_64 system the parallel port 
> doesn't work right. If I "cat some_asciifile >/dev/lp0"  the output on my 
> Epson Stylus Color 880 is unreadable.  "cat /dev/zero >/dev/lp0"  creates 
> random characters on the paper. Printing using cups also doesn't work any 
> more. 
> Switching back to SUSEs  2.6.18.8-0.1 kernel fixes the problem.
> Any Ideas, what might be broken here ? 

Nope, but I have the same problem.
I'll dig into it some day, but it's not very high priority for me.

I haven't tested it lately.  Do you still see this problem?

---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***

Re: parallel port problems with 2.6.21_rc5 and 2.6.21_rc6_git3-20070410174235

[Markus Koßmann]

Am Donnerstag, 3. Mai 2007 schrieb Randy Dunlap:
> On Wed, 11 Apr 2007 20:40:23 +0200 Markus Koßmann wrote:
> > When using either the unpatched  2.6.21_rc5   or SUSEs patched
> > 2.6.21_rc6_git3-20070410174235 on a SUSE-10.2 x86_64 system the parallel
> > port doesn't work right. If I "cat some_asciifile >/dev/lp0"  the output
> > on my Epson Stylus Color 880 is unreadable.  "cat /dev/zero >/dev/lp0" 
> > creates random characters on the paper. Printing using cups also doesn't
> > work any more.
> > Switching back to SUSEs  2.6.18.8-0.1 kernel fixes the problem.
> > Any Ideas, what might be broken here ?
>
> Nope, but I have the same problem.
> I'll dig into it some day, but it's not very high priority for me.
>
> I haven't tested it lately.  Do you still see this problem?
>
Yes, it still exists with SUSEs  2.6.21-20070502152652 kernel. Didn't check 
with vanilla 2.6.21 yet. 

Re: parallel port problems with 2.6.21_rc5 and 2.6.21_rc6_git3-20070410174235

[Randy Dunlap]

On Sat, 5 May 2007 16:58:22 +0200 Markus Koßmann wrote:

> Am Donnerstag, 3. Mai 2007 schrieb Randy Dunlap:
> > On Wed, 11 Apr 2007 20:40:23 +0200 Markus Koßmann wrote:
> > > When using either the unpatched  2.6.21_rc5   or SUSEs patched
> > > 2.6.21_rc6_git3-20070410174235 on a SUSE-10.2 x86_64 system the parallel
> > > port doesn't work right. If I "cat some_asciifile >/dev/lp0"  the output
> > > on my Epson Stylus Color 880 is unreadable.  "cat /dev/zero >/dev/lp0" 
> > > creates random characters on the paper. Printing using cups also doesn't
> > > work any more.
> > > Switching back to SUSEs  2.6.18.8-0.1 kernel fixes the problem.
> > > Any Ideas, what might be broken here ?
> >
> > Nope, but I have the same problem.
> > I'll dig into it some day, but it's not very high priority for me.
> >
> > I haven't tested it lately.  Do you still see this problem?
> >
> Yes, it still exists with SUSEs  2.6.21-20070502152652 kernel. Didn't check 
> with vanilla 2.6.21 yet. 

Hi Markus,

I just retested this on 2.6.21-git12 and didn't have a problem
with printing.  Can you test on 2.6.22-rc1?


---
~Randy
*** Remember to use Documentation/SubmitChecklist when testing your code ***

Re: parallel port problems with 2.6.21_rc5 and 2.6.21_rc6_git3-20070410174235

[Markus Koßmann]

Am Montag, 14. Mai 2007 schrieb Randy Dunlap:
> On Sat, 5 May 2007 16:58:22 +0200 Markus Koßmann wrote:
> > Am Donnerstag, 3. Mai 2007 schrieb Randy Dunlap:
> > > On Wed, 11 Apr 2007 20:40:23 +0200 Markus Koßmann wrote:
> > > > When using either the unpatched  2.6.21_rc5   or SUSEs patched
> > > > 2.6.21_rc6_git3-20070410174235 on a SUSE-10.2 x86_64 system the
> > > > parallel port doesn't work right. If I "cat some_asciifile >/dev/lp0"
> > > >  the output on my Epson Stylus Color 880 is unreadable.  "cat
> > > > /dev/zero >/dev/lp0" creates random characters on the paper. Printing
> > > > using cups also doesn't work any more.
> > > > Switching back to SUSEs  2.6.18.8-0.1 kernel fixes the problem.
> > > > Any Ideas, what might be broken here ?
> > >
> > > Nope, but I have the same problem.
> > > I'll dig into it some day, but it's not very high priority for me.
> > >
> > > I haven't tested it lately.  Do you still see this problem?
> >
> > Yes, it still exists with SUSEs  2.6.21-20070502152652 kernel. Didn't
> > check with vanilla 2.6.21 yet.
>
> Hi Markus,
>
> I just retested this on 2.6.21-git12 and didn't have a problem
> with printing.  Can you test on 2.6.22-rc1?
>
Seems to be fixed in  2.6.22-rc1 but vanilla 2.6.21 was also bad. 

Re: parallel port problems with 2.6.21_rc5 and 2.6.21_rc6_git3-20070410174235

[Bill Davidsen]

Randy Dunlap wrote:
> On Wed, 11 Apr 2007 20:40:23 +0200 Markus Koßmann wrote:
> 
>> When using either the unpatched  2.6.21_rc5   or SUSEs patched 
>> 2.6.21_rc6_git3-20070410174235 on a SUSE-10.2 x86_64 system the parallel port 
>> doesn't work right. If I "cat some_asciifile >/dev/lp0"  the output on my 
>> Epson Stylus Color 880 is unreadable.  "cat /dev/zero >/dev/lp0"  creates 
>> random characters on the paper. Printing using cups also doesn't work any 
>> more. 
>> Switching back to SUSEs  2.6.18.8-0.1 kernel fixes the problem.
>> Any Ideas, what might be broken here ? 
> 
> Nope, but I have the same problem.
> I'll dig into it some day, but it's not very high priority for me.
> 
At some point that could be a problem, I have a shared printer on 
parallel (and replacing a printer for 11x17 work isn't cheap), as well 
as one PL/IP requirement, which is embedded in industrial machinery not 
likely to be upgraded.

Non-critical in the sense that I'm sure I can run old kernels for a 
decade if needed, but hopefully something to be fixed. Since there's no 
regressions list any more, I guess we will all have to complain about 
problems individually. :-(

-- 
Bill Davidsen <davidsen@tmr.com>
   "We have more to fear from the bungling of the incompetent than from
the machinations of the wicked."  - from Slashdot