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From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: Jim Paris <jim@jtan.com>
Cc: Thomas Drillich <th@drillich.com>,
	linux-hotplug@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: ide dvd burner detected as ide-tape
Date: Thu, 09 Oct 2008 18:50:09 +0000	[thread overview]
Message-ID: <200810092050.09576.bzolnier@gmail.com> (raw)
In-Reply-To: <20081009183925.GA24460@psychosis.jim.sh>

On Thursday 09 October 2008, Jim Paris wrote:
> Bartlomiej Zolnierkiewicz wrote:
> > Thanks.  Does the following patch help?
> > 
> > From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> > Subject: [PATCH] ide: quirk for LG GH22LP20 DVD burner
> > 
> > LG GH22LP20 DVD burner ("HL)DP-ST@V@-RAI CH22HP20") with firmware 1.00
> > reports 0x01 ("Sequential-access device") as the peripheral device type
> > instead of 0x05 ("CD-ROM device").
> 
> That looks more like a hardware problem with a flakey bit.
> For example GH22LP20 with bit 2 always cleared = CH22HP20.
> DVD-ROM with bit 2 sometimes cleared = @V@-RAI.
> And the peripheral device type also has bit 2 cleared.

This would explain it nicely (I suspected something along these lines
but failed to see the actual pattern).  After all it is very unlikely
to have _that_ broken firmware.

Thanks,
Bart

WARNING: multiple messages have this Message-ID (diff)
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
To: Jim Paris <jim@jtan.com>
Cc: Thomas Drillich <th@drillich.com>,
	linux-hotplug@vger.kernel.org, linux-ide@vger.kernel.org
Subject: Re: ide dvd burner detected as ide-tape
Date: Thu, 9 Oct 2008 20:50:09 +0200	[thread overview]
Message-ID: <200810092050.09576.bzolnier@gmail.com> (raw)
In-Reply-To: <20081009183925.GA24460@psychosis.jim.sh>

On Thursday 09 October 2008, Jim Paris wrote:
> Bartlomiej Zolnierkiewicz wrote:
> > Thanks.  Does the following patch help?
> > 
> > From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
> > Subject: [PATCH] ide: quirk for LG GH22LP20 DVD burner
> > 
> > LG GH22LP20 DVD burner ("HL)DP-ST@V@-RAI CH22HP20") with firmware 1.00
> > reports 0x01 ("Sequential-access device") as the peripheral device type
> > instead of 0x05 ("CD-ROM device").
> 
> That looks more like a hardware problem with a flakey bit.
> For example GH22LP20 with bit 2 always cleared = CH22HP20.
> DVD-ROM with bit 2 sometimes cleared = @V@-RAI.
> And the peripheral device type also has bit 2 cleared.

This would explain it nicely (I suspected something along these lines
but failed to see the actual pattern).  After all it is very unlikely
to have _that_ broken firmware.

Thanks,
Bart

  reply	other threads:[~2008-10-09 18:50 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-09-30 23:00 ide dvd burner detected as ide-tape Thomas Drillich
2008-10-01  3:52 ` Kay Sievers
2008-10-03 13:27 ` Thomas Drillich
2008-10-03 13:36 ` Kay Sievers
2008-10-03 17:33 ` Bartlomiej Zolnierkiewicz
2008-10-04 12:12 ` Thomas Drillich
2008-10-08 19:25   ` Bartlomiej Zolnierkiewicz
2008-10-08 19:25     ` Bartlomiej Zolnierkiewicz
2008-10-09 14:43     ` Thomas Drillich
2008-10-09 14:43       ` Thomas Drillich
2008-10-09 18:13       ` Bartlomiej Zolnierkiewicz
2008-10-09 18:13         ` Bartlomiej Zolnierkiewicz
2008-10-09 18:39         ` Jim Paris
2008-10-09 18:39           ` Jim Paris
2008-10-09 18:50           ` Bartlomiej Zolnierkiewicz [this message]
2008-10-09 18:50             ` Bartlomiej Zolnierkiewicz
2008-10-12 22:18           ` Thomas Drillich
2008-10-12 22:18             ` Thomas Drillich

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