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Flaky graphics card, traget display mode
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Richard Tobin
Jan 12, 2016, 9:50:01 AM1/12/16
to
I have a mid-2011 27" iMac which seems to have a faulty graphics card.
Coloured blocks appear on the screen, and sometimes the graphics stop
working completely with GPU Hang State messages in the log.
Apple has (or had) a repair program for mid-2011 iMacs with 6970M
graphics cards, but this has a 6770M, and is of course out of warranty.
I'm planning to get a new iMac, and I'm wondering:
- Does target display mode require a working graphics card?
That is, would I be able to use the old iMac as an extra
monitor with the new one?
- How does target display mode work anyway? Can you ssh in to
the target machine while it's displaying for another Mac?
-- Richard
Coloured blocks appear on the screen, and sometimes the graphics stop
working completely with GPU Hang State messages in the log.
Apple has (or had) a repair program for mid-2011 iMacs with 6970M
graphics cards, but this has a 6770M, and is of course out of warranty.
I'm planning to get a new iMac, and I'm wondering:
- Does target display mode require a working graphics card?
That is, would I be able to use the old iMac as an extra
monitor with the new one?
- How does target display mode work anyway? Can you ssh in to
the target machine while it's displaying for another Mac?
-- Richard
Jon B
Jan 12, 2016, 2:09:23 PM1/12/16
to
Richard Tobin <ric...@cogsci.ed.ac.uk> wrote:
> I have a mid-2011 27" iMac which seems to have a faulty graphics card.
> Coloured blocks appear on the screen, and sometimes the graphics stop
> working completely with GPU Hang State messages in the log.
>
> Apple has (or had) a repair program for mid-2011 iMacs with 6970M
> graphics cards, but this has a 6770M, and is of course out of warranty.
>
> I'm planning to get a new iMac, and I'm wondering:
>
> - Does target display mode require a working graphics card?
> That is, would I be able to use the old iMac as an extra
> monitor with the new one?
>
Not tested, but I'm imagine so as the iMac is still driving the monitor,
> I have a mid-2011 27" iMac which seems to have a faulty graphics card.
> Coloured blocks appear on the screen, and sometimes the graphics stop
> working completely with GPU Hang State messages in the log.
>
> Apple has (or had) a repair program for mid-2011 iMacs with 6970M
> graphics cards, but this has a 6770M, and is of course out of warranty.
>
> I'm planning to get a new iMac, and I'm wondering:
>
> - Does target display mode require a working graphics card?
> That is, would I be able to use the old iMac as an extra
> monitor with the new one?
>
so if it isn't lighting up for the internal, I doubt it will for the
external.
> - How does target display mode work anyway? Can you ssh in to
> the target machine while it's displaying for another Mac?
>
the other machine, so I've just hooked my Mini up here to a 2011 27"
iMac there, then fired up screen sharing so I could control the iMac via
the Mini.
--
Jon B
Above email address IS valid.
<http://www.bramley-computers.co.uk/>
Richard Tobin
Feb 1, 2016, 10:40:03 AM2/1/16
to
In article <n733jb$1kpt$1...@macpro.inf.ed.ac.uk>, I wrote:
I've now tried this and to my surprise it works: the old iMac is
working as a second display even though it is constantly reporting GPU
hangs in system.log.
The command to become a target display is command-F2, but it took me
three keyboards until I found one that it works with.
-- Richard
working as a second display even though it is constantly reporting GPU
hangs in system.log.
The command to become a target display is command-F2, but it took me
three keyboards until I found one that it works with.
-- Richard
Jaimie Vandenbergh
Feb 1, 2016, 5:41:34 PM2/1/16
to
On Mon, 1 Feb 2016 15:35:45 +0000 (UTC), ric...@cogsci.ed.ac.uk
(Richard Tobin) wrote:
>In article <n733jb$1kpt$1...@macpro.inf.ed.ac.uk>, I wrote:
>Richard Tobin <ric...@cogsci.ed.ac.uk> wrote:
>>I have a mid-2011 27" iMac which seems to have a faulty graphics card.
>>Coloured blocks appear on the screen, and sometimes the graphics stop
>>working completely with GPU Hang State messages in the log.
>>
>>Apple has (or had) a repair program for mid-2011 iMacs with 6970M
>>graphics cards, but this has a 6770M, and is of course out of warranty.
>>
>>I'm planning to get a new iMac, and I'm wondering:
>>
>> - Does target display mode require a working graphics card?
>> That is, would I be able to use the old iMac as an extra
>> monitor with the new one?
>>
>> - How does target display mode work anyway? Can you ssh in to
>> the target machine while it's displaying for another Mac?
>
>I've now tried this and to my surprise it works: the old iMac is
>working as a second display even though it is constantly reporting GPU
>hangs in system.log.
How splendid! Shame it's not possible to put the cpu etc to sleep and
(Richard Tobin) wrote:
>In article <n733jb$1kpt$1...@macpro.inf.ed.ac.uk>, I wrote:
>Richard Tobin <ric...@cogsci.ed.ac.uk> wrote:
>>I have a mid-2011 27" iMac which seems to have a faulty graphics card.
>>Coloured blocks appear on the screen, and sometimes the graphics stop
>>working completely with GPU Hang State messages in the log.
>>
>>Apple has (or had) a repair program for mid-2011 iMacs with 6970M
>>graphics cards, but this has a 6770M, and is of course out of warranty.
>>
>>I'm planning to get a new iMac, and I'm wondering:
>>
>> - Does target display mode require a working graphics card?
>> That is, would I be able to use the old iMac as an extra
>> monitor with the new one?
>>
>> - How does target display mode work anyway? Can you ssh in to
>> the target machine while it's displaying for another Mac?
>
>I've now tried this and to my surprise it works: the old iMac is
>working as a second display even though it is constantly reporting GPU
>hangs in system.log.
use the screen anyway, but it's only about 30W so not to horrible.
Cheers - Jaimie
--
"You know how dumb the average person is? Well, by definition,
half of 'em are dumber than THAT." - J.R. "Bob" Dobbs
Martin S Taylor
Feb 2, 2016, 4:06:33 AM2/2/16
to
On Jan 12, 2016, Richard Tobin wrote
(in article <n733jb$1kpt$1...@macpro.inf.ed.ac.uk>):
> I have a mid-2011 27" iMac which seems to have a faulty graphics card.
> Coloured blocks appear on the screen, and sometimes the graphics stop
> working completely with GPU Hang State messages in the log.
>
> Apple has (or had) a repair program for mid-2011 iMacs with 6970M
> graphics cards, but this has a 6770M, and is of course out of warranty.
I don’t know what graphics card I had, but when mine failed completely (on
a mid-2011 iMac) I took it to Viewdata in Staines. They referred it to Apple,
who said it was out of warranty, but Viewdata argued the toss, citing some EU
regulation, and eventually Apple capitulated and sent the replacement card
and paid for the repair.
Such service from Viewdata is, I think, impressively commendable, since
they’ll have cost themselves a lot of money by arguing on my behalf in this
way.
MST
(in article <n733jb$1kpt$1...@macpro.inf.ed.ac.uk>):
> I have a mid-2011 27" iMac which seems to have a faulty graphics card.
> Coloured blocks appear on the screen, and sometimes the graphics stop
> working completely with GPU Hang State messages in the log.
>
> Apple has (or had) a repair program for mid-2011 iMacs with 6970M
> graphics cards, but this has a 6770M, and is of course out of warranty.
a mid-2011 iMac) I took it to Viewdata in Staines. They referred it to Apple,
who said it was out of warranty, but Viewdata argued the toss, citing some EU
regulation, and eventually Apple capitulated and sent the replacement card
and paid for the repair.
Such service from Viewdata is, I think, impressively commendable, since
they’ll have cost themselves a lot of money by arguing on my behalf in this
way.
MST
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