*ERROR* PCH transcoder A FIFO underrun

[Oliver Ruebenacker]

Hello,

On trying to boot, Fedora crashes on my Lenovo Thinkpad T430 with this
message:

Booting 'Fedora (3.15.4-200.fc20.x86_64) 20 (Heisenbug)'

[   2.718947] [drm:cpt:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO
underrun

Actually, all kernels after 3.13.10-200.fc20.x86_64 are crashing on boot
on my laptop, but this is the first time I get an error message. Plus, I
also have random crashes a few times per day.

Any ideas? Thanks!

Best,
     Oliver

[Balint Szigeti]

I didn't have chance to try but I think the latest kernel fixes it:
> $ rpm -q --changelog kernel-3.15.4-200.fc20|more
> Mon Jul 07 2014 Justin M. Forbes  3.15.4-200
> Linux v3.15.4
> Fixes CVE-2014-4715 (rhbz 1115767 1116362)
> Fixes CVE-2014-4699 (rhbz 1115927 1116477)
> Tue Jul 01 2014 Justin M. Forbes  3.15.3-200
> Linux v3.15.3
> drm/i915: Fix backlight regression caused by misconfigured VBT
> Tue Jul 01 2014 Hans de Goede
> Add min/max quirk for the ThinkPad Edge E531 touchpad (rhbz#1114768)

Balint

On Fri, 2014-07-11 at 11:23 -0400, Oliver Ruebenacker wrote:
>  Hello,
>
>
> On trying to boot, Fedora crashes on my Lenovo Thinkpad T430 with
> this message:
>
> Booting 'Fedora (3.15.4-200.fc20.x86_64) 20 (Heisenbug)'
>
> [   2.718947] [drm:cpt:cpt_serr_int_handler] *ERROR* PCH transcoder A
> FIFO underrun
>
> Actually, all kernels after 3.13.10-200.fc20.x86_64 are crashing on
> boot on my laptop, but this is the first time I get an error message.
> Plus, I also have random crashes a few times per day.
>
> Any ideas? Thanks!
>  Best,
>
>  Oliver
>
>
>
> --
>
> Oliver Ruebenacker
>
> Founder at Relomics Consulting
>
> Be always grateful, but never satisfied.

[Oliver Ruebenacker]

Hello,

You mean once I update to yet another kernel, things should be working
again? Would you mind explaining the reason for this hope?

Not sure about the quoted diff - I don't see how my problem is related to
backlights?

Thanks!

Best,
     Oliver

On Fri, Jul 11, 2014 at 12:10 PM, Balint Szigeti 
wrote:
> I didn't have chance to try but I think the latest kernel fixes it:
>
> $ rpm -q --changelog kernel-3.15.4-200.fc20|more
> Mon Jul 07 2014 Justin M. Forbes  3.15.4-200
> Linux v3.15.4
> Fixes CVE-2014-4715 (rhbz 1115767 1116362)
> Fixes CVE-2014-4699 (rhbz 1115927 1116477)
> Tue Jul 01 2014 Justin M. Forbes  3.15.3-200
> Linux v3.15.3*- drm/i915: Fix backlight regression caused by misconfigured VBT*
> Tue Jul 01 2014 Hans de Goede
> Add min/max quirk for the ThinkPad Edge E531 touchpad (rhbz#1114768)
>
> Balint
>
> On Fri, 2014-07-11 at 11:23 -0400, Oliver Ruebenacker wrote:
>   Hello,
>
>
> On trying to boot, Fedora crashes on my Lenovo Thinkpad T430 with this
> message:
>
> Booting 'Fedora (3.15.4-200.fc20.x86_64) 20 (Heisenbug)'
>
> [   2.718947] [drm:cpt:cpt_serr_int_handler] *ERROR* PCH transcoder A
> FIFO underrun
>
> Actually, all kernels after 3.13.10-200.fc20.x86_64 are crashing on
> boot on my laptop, but this is the first time I get an error message. Plus,
> I also have random crashes a few times per day.
>
> Any ideas? Thanks!
>   Best,
>
>   Oliver
>
>
>
> --
>
> Oliver Ruebenacker
>
> Founder at Relomics Consulting http://www.relomics.com
>
> Be always grateful, but never satisfied.
>
> --
> users mailing list
> [e-mail]
> To unsubscribe or change subscription options:
> https://admin.fedoraproject.org/mailman/listinfo/users
> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
> Have a question? Ask away: http://ask.fedoraproject.org

[poma]

On 11.07.2014 17:23, Oliver Ruebenacker wrote:
>   Hello,
>
> On trying to boot, Fedora crashes on my Lenovo Thinkpad T430 with this
> message:
>
> Booting 'Fedora (3.15.4-200.fc20.x86_64) 20 (Heisenbug)'
>
> [   2.718947] [drm:cpt:cpt_serr_int_handler] *ERROR* PCH transcoder A FIFO
> underrun
>
> Actually, all kernels after 3.13.10-200.fc20.x86_64 are crashing on boot
> on my laptop, but this is the first time I get an error message. Plus, I
> also have random crashes a few times per day.
>
> Any ideas? Thanks!
>   Best,
>   Oliver

'Allo 'Allo!
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git/log/drivers...

It is I, LeClerc

[poma]

http://www.linlap.com/lenovo_thinkpad_t430
https://apps.fedoraproject.org/packages/xorg-x11-drv-intel/bugs/all

http://fedoraproject.org/wiki/How_to_debug_Xorg_problems#All_bug_reports
...
output of the dmesg command ...
https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora&component=xorg-...

poma

[Oliver Ruebenacker]

Hello,

On Fri, Jul 11, 2014 at 2:12 PM, poma  wrote:
> http://www.linlap.com/lenovo_thinkpad_t430
> https://apps.fedoraproject.org/packages/xorg-x11-drv-intel/bugs/all
>
> http://fedoraproject.org/wiki/How_to_debug_Xorg_problems#All_bug_reports
> ...
> output of the dmesg command ...
> https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora&
> component=xorg-x11-drv-intel

Thanks for the links, but could you explain what I am supposed to learn
from these links?

I see a similar error listed somewhere, but about attaching an external
monitor. I have not currently an external monitor attached (though I had in
the past). Is this relevant to my case?

The last one seems to require an account to access - is it worth signing
up?

Thanks!

Best,
     Oliver
> poma
>
> --
> users mailing list
> [e-mail]
> To unsubscribe or change subscription options:
> https://admin.fedoraproject.org/mailman/listinfo/users
> Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct
> Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
> Have a question? Ask away: http://ask.fedoraproject.org

[poma]

On 12.07.2014 18:34, Oliver Ruebenacker wrote:
>   Hello,
>
> On Fri, Jul 11, 2014 at 2:12 PM, poma  wrote:
> > http://www.linlap.com/lenovo_thinkpad_t430
> > https://apps.fedoraproject.org/packages/xorg-x11-drv-intel/bugs/all
> >
> > http://fedoraproject.org/wiki/How_to_debug_Xorg_problems#All_bug_reports
> > ...
> > output of the dmesg command ...
> > https://bugzilla.redhat.com/enter_bug.cgi?product=Fedora&
> > component=xorg-x11-drv-intel
>
> Thanks for the links, but could you explain what I am supposed to learn
> from these links?

Intel DRM is one of the most committed kernel components in general, perhaps. :)
> I see a similar error listed somewhere, but about attaching an external
> monitor. I have not currently an external monitor attached (though I had in
> the past). Is this relevant to my case?

Is that what you've seen somewhere relevant to your case.
Perhaps you can probably ask where you saw it? :)
> The last one seems to require an account to access - is it worth signing
> up?

Ohh.

poma