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Opened 7 years ago

Closed 6 years ago

Last modified 6 years ago

#2741 closed patch (fixed)

disable the active EIT scan for open on demand DVB cards

Reported by: Janne <janne-mythtv@…> Owned by: janne
Priority: trivial Milestone: 0.21
Component: dvb Version: head
Severity: low Keywords:
Cc: Ticket locked: no

Description

Daniel, I've seen that you haven't applied similar code in #437.

Don't using a dvb card marked as open on demand for active eit scan seems more logical than using it all the time.

I started again on making the eit scanner global. So we will be soon able to scan only occasionally. But it will take one or two weeks till it is finished.

Due to a hardware or driver bug in the dual tuner card Hauppauge Nova-T 500 there is some demand to disable the active eit scan for one frontend of this card. Some reports suggest that a specific pattern of tuning commands can cause a usb disconnect. The disconnect is a nasty error since neither the dvb subsystem nor mythtv are hotplugable. The backend is a zombie after a disconnect and the kernel needs a reboot.

We had also occasionally request to make dvb_on_demand useable with activated EIT.

I don't think there is a great need to apply this patch now. But I added a database update which disables dvb_on_demad for each card wconnected to a useeit videosource.

References #1035

Attachments (4)

20061128_dvb_on_demand.diff (4.0 KB) - added by Janne <janne-mythtv@…> 7 years ago.
2741_0.20-fixes.diff (2.3 KB) - added by janne 7 years ago.
same patch for 0.20-fixes
20070314_dvb_on_demand.diff (4.0 KB) - added by stuartm 7 years ago.
Updated patch against 13045
disable_active_eitscan.diff (5.7 KB) - added by janne 6 years ago.
Add an option to disable active eit scan per dvb device

Download all attachments as: .zip

Change History (11)

Changed 7 years ago by Janne <janne-mythtv@…>

comment:1 Changed 7 years ago by danielk

  • Resolution set to wontfix
  • Status changed from new to closed

I think we can wait a couple weeks for comprehensive solution. :)

We can point Nova-T 500 users to this ticket in the meantime, but I'm closing it since I would only want to apply something like this if we can't get a proper solution working before the next release.

Changed 7 years ago by janne

same patch for 0.20-fixes

Changed 7 years ago by stuartm

Updated patch against 13045

Changed 6 years ago by janne

Add an option to disable active eit scan per dvb device

comment:2 Changed 6 years ago by janne

[disable_active_eitscan.diff http://svn.mythtv.org/trac/attachment/ticket/2741/disable_active_eitscan.diff] adds a per dvb card option to disable active eit scan.

comment:3 Changed 6 years ago by danielk

  • Milestone changed from unknown to 0.21
  • Resolution wontfix deleted
  • Status changed from closed to new

comment:4 Changed 6 years ago by janne

  • Owner changed from danielk to janne
  • Status changed from new to accepted

comment:5 Changed 6 years ago by janne

  • Resolution set to fixed
  • Status changed from accepted to closed

(In [15730]) Adds option to disable active eit scan for DVB cards

Some dibcom based usb devices (including the Nova-T500) have a nasty bug
which is mostly triggered by our continuous eit scanning.
The card becomes useless until the device nodes are closed and reopened.
Implementing a recovery function in MythTV would be mess since
dual tuner cards are affected and we would need to close both adapters
simultaneously. Fixes #2741.

comment:6 Changed 6 years ago by janne

(In [15735]) fix typo in [15730]

missing comma in database query probably broke firewire and dbox2 recorders. Refs #2741

comment:7 in reply to: ↑ description Changed 6 years ago by anonymous

Replying to Janne <janne-mythtv@grunau.be>:

I started again on making the eit scanner global. So we will be soon able to scan only occasionally. But it will take one or two weeks till it is finished.

Hi, just updating this ticket to cross-reference to my enhancement ticket #5754 where I supply a patch to make active EIT scan only occasionally. It looks like you were intending to add this kind of functionality so it may save you some time.
Best regards, Simon.

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