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External monitor not waking
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Daniel Cohen
Apr 25, 2018, 3:15:22 AM4/25/18
to
My Mac is a 2011 MacBookPro running OS 10.13.4. This is connected by
Thunderbolt to a Belkin dock, which in turn is connected to a Dell
U2414H monitor.
Most of the time this works fine, but recently (not sure if it started
when I went to 10.13.4 or whether it had happened on 10.13.3) the
monitor sometimes refuses to wake up when I wake the computer from
sleep. That is, the monitor insists on remaining in Power Save mode, and
in fact says "entering power save mode" when the computer wakes.
So far I have solved it by a mix of turning monitor on and off,
disconnecting power cable of monitor and reconnecting it, and restarting
the computer. But I haven't found a consistent set of steps to get it to
work.
Any ideas for more diagnostic steps, or even a solution? As I said, this
is an occasional problem, usually the monitor becomes active as soon as
the computer wakes, but it occurs often enough to be troublesome.
--
<http://www.decohen.com>
The Labyrinth of the Heart: Changed Myths for Changing Lives
book and e-book <http://www.decohen.com/labyrinth.htm>
Send e-mail to the Reply-To address, not the From address.
Thunderbolt to a Belkin dock, which in turn is connected to a Dell
U2414H monitor.
Most of the time this works fine, but recently (not sure if it started
when I went to 10.13.4 or whether it had happened on 10.13.3) the
monitor sometimes refuses to wake up when I wake the computer from
sleep. That is, the monitor insists on remaining in Power Save mode, and
in fact says "entering power save mode" when the computer wakes.
So far I have solved it by a mix of turning monitor on and off,
disconnecting power cable of monitor and reconnecting it, and restarting
the computer. But I haven't found a consistent set of steps to get it to
work.
Any ideas for more diagnostic steps, or even a solution? As I said, this
is an occasional problem, usually the monitor becomes active as soon as
the computer wakes, but it occurs often enough to be troublesome.
--
<http://www.decohen.com>
The Labyrinth of the Heart: Changed Myths for Changing Lives
book and e-book <http://www.decohen.com/labyrinth.htm>
Send e-mail to the Reply-To address, not the From address.
nospam
Apr 25, 2018, 5:22:19 AM4/25/18
to
In article <1nnszqn.1yxppaq10wk859N%dcohe...@talktalk.net>, Daniel
cheap chinese crap.
Cohen <dcohe...@talktalk.net> wrote:
> My Mac is a 2011 MacBookPro running OS 10.13.4. This is connected by
> Thunderbolt to a Belkin dock, which in turn is connected to a Dell
> U2414H monitor.
>
> Most of the time this works fine, but recently (not sure if it started
> when I went to 10.13.4 or whether it had happened on 10.13.3) the
> monitor sometimes refuses to wake up when I wake the computer from
> sleep. That is, the monitor insists on remaining in Power Save mode, and
> in fact says "entering power save mode" when the computer wakes.
>
> So far I have solved it by a mix of turning monitor on and off,
> disconnecting power cable of monitor and reconnecting it, and restarting
> the computer. But I haven't found a consistent set of steps to get it to
> work.
>
> Any ideas for more diagnostic steps, or even a solution? As I said, this
> is an occasional problem, usually the monitor becomes active as soon as
> the computer wakes, but it occurs often enough to be troublesome.
the first thing to try is get rid of the belkin dock. belkin relabels
> My Mac is a 2011 MacBookPro running OS 10.13.4. This is connected by
> Thunderbolt to a Belkin dock, which in turn is connected to a Dell
> U2414H monitor.
>
> Most of the time this works fine, but recently (not sure if it started
> when I went to 10.13.4 or whether it had happened on 10.13.3) the
> monitor sometimes refuses to wake up when I wake the computer from
> sleep. That is, the monitor insists on remaining in Power Save mode, and
> in fact says "entering power save mode" when the computer wakes.
>
> So far I have solved it by a mix of turning monitor on and off,
> disconnecting power cable of monitor and reconnecting it, and restarting
> the computer. But I haven't found a consistent set of steps to get it to
> work.
>
> Any ideas for more diagnostic steps, or even a solution? As I said, this
> is an occasional problem, usually the monitor becomes active as soon as
> the computer wakes, but it occurs often enough to be troublesome.
cheap chinese crap.
Daniel Cohen
Apr 25, 2018, 8:41:10 AM4/25/18
to
nospam <nos...@nospam.invalid> wrote:
> the first thing to try is get rid of the belkin dock. belkin relabels
> cheap chinese crap.
May be the ultimate solution, but definitely NOT the first thing.
> the first thing to try is get rid of the belkin dock. belkin relabels
> cheap chinese crap.
You are suggesting I spend a great deal of money when the answer may be
something much simpler.
Neill Massello
Apr 25, 2018, 10:23:10 AM4/25/18
to
Daniel Cohen <dcohe...@talktalk.net> wrote:
> May be the ultimate solution, but definitely NOT the first thing.
>
> You are suggesting I spend a great deal of money when the answer may be
> something much simpler.
Connecting the display directly to the Mac, rather than through the
> May be the ultimate solution, but definitely NOT the first thing.
>
> You are suggesting I spend a great deal of money when the answer may be
> something much simpler.
dock, should definitely have been one of the earliest diagnostic steps.
Jolly Roger
Apr 25, 2018, 10:38:25 AM4/25/18
to
On 2018-04-25, Daniel Cohen <dcohe...@talktalk.net> wrote:
> My Mac is a 2011 MacBookPro running OS 10.13.4. This is connected by
> Thunderbolt to a Belkin dock, which in turn is connected to a Dell
> U2414H monitor.
>
> Most of the time this works fine, but recently (not sure if it started
> when I went to 10.13.4 or whether it had happened on 10.13.3) the
> monitor sometimes refuses to wake up when I wake the computer from
> sleep. That is, the monitor insists on remaining in Power Save mode, and
> in fact says "entering power save mode" when the computer wakes.
>
> So far I have solved it by a mix of turning monitor on and off,
> disconnecting power cable of monitor and reconnecting it, and restarting
> the computer. But I haven't found a consistent set of steps to get it to
> work.
>
> Any ideas for more diagnostic steps, or even a solution? As I said, this
> is an occasional problem, usually the monitor becomes active as soon as
> the computer wakes, but it occurs often enough to be troublesome.
Which model Belkin dock is this?
> My Mac is a 2011 MacBookPro running OS 10.13.4. This is connected by
> Thunderbolt to a Belkin dock, which in turn is connected to a Dell
> U2414H monitor.
>
> Most of the time this works fine, but recently (not sure if it started
> when I went to 10.13.4 or whether it had happened on 10.13.3) the
> monitor sometimes refuses to wake up when I wake the computer from
> sleep. That is, the monitor insists on remaining in Power Save mode, and
> in fact says "entering power save mode" when the computer wakes.
>
> So far I have solved it by a mix of turning monitor on and off,
> disconnecting power cable of monitor and reconnecting it, and restarting
> the computer. But I haven't found a consistent set of steps to get it to
> work.
>
> Any ideas for more diagnostic steps, or even a solution? As I said, this
> is an occasional problem, usually the monitor becomes active as soon as
> the computer wakes, but it occurs often enough to be troublesome.
--
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.
JR
Jolly Roger
Apr 25, 2018, 10:46:49 AM4/25/18
to
nospam
Apr 25, 2018, 11:51:56 AM4/25/18
to
In article <1nntf75.wt7661j3i5vaN%dcohe...@talktalk.net>, Daniel
> You are suggesting I spend a great deal of money when the answer may be
> something much simpler.
what money?
according to what i found online, that display supports hdmi and
minidisplayport.
you said your mac is a 2011 macbook pro, which has thunderbolt &
mini-displayport in the same connector.
a mini-displayport cable is a few bucks and an hdmi adapter only
slightly more. you might even have either or both already. there are
plenty on ebay if you don't want to pay retail price, but it will take
a couple of days to get it, at a minimum.
if it solves the problem, you know it's the belkin. if not, then
further investigation is needed.
Cohen <dcohe...@talktalk.net> wrote:
> > the first thing to try is get rid of the belkin dock. belkin relabels
> > cheap chinese crap.
>
> May be the ultimate solution, but definitely NOT the first thing.
absolutely the first thing to try.
> > the first thing to try is get rid of the belkin dock. belkin relabels
> > cheap chinese crap.
>
> May be the ultimate solution, but definitely NOT the first thing.
> You are suggesting I spend a great deal of money when the answer may be
> something much simpler.
according to what i found online, that display supports hdmi and
minidisplayport.
you said your mac is a 2011 macbook pro, which has thunderbolt &
mini-displayport in the same connector.
a mini-displayport cable is a few bucks and an hdmi adapter only
slightly more. you might even have either or both already. there are
plenty on ebay if you don't want to pay retail price, but it will take
a couple of days to get it, at a minimum.
if it solves the problem, you know it's the belkin. if not, then
further investigation is needed.
Jolly Roger
Apr 25, 2018, 12:19:06 PM4/25/18
to
On 2018-04-25, nospam <nos...@nospam.invalid> wrote:
> In article <1nntf75.wt7661j3i5vaN%dcohe...@talktalk.net>, Daniel
> Cohen <dcohe...@talktalk.net> wrote:
>
>> > the first thing to try is get rid of the belkin dock. belkin relabels
>> > cheap chinese crap.
>>
>> May be the ultimate solution, but definitely NOT the first thing.
>
> absolutely the first thing to try.
>
>> You are suggesting I spend a great deal of money when the answer may be
>> something much simpler.
>
> what money?
>
> according to what i found online, that display supports hdmi and
> minidisplayport.
And according to Dell, it comes with a DisplayPort cable in the box:
> In article <1nntf75.wt7661j3i5vaN%dcohe...@talktalk.net>, Daniel
> Cohen <dcohe...@talktalk.net> wrote:
>
>> > the first thing to try is get rid of the belkin dock. belkin relabels
>> > cheap chinese crap.
>>
>> May be the ultimate solution, but definitely NOT the first thing.
>
> absolutely the first thing to try.
>
>> You are suggesting I spend a great deal of money when the answer may be
>> something much simpler.
>
> what money?
>
> according to what i found online, that display supports hdmi and
> minidisplayport.
<http://www.dell.com/ed/business/p/dell-u2414h/pd>
> you said your mac is a 2011 macbook pro, which has thunderbolt &
> mini-displayport in the same connector.
> if it solves the problem, you know it's the belkin. if not, then
> further investigation is needed.
nospam
Apr 25, 2018, 12:23:09 PM4/25/18
to
In article <fkbo3o...@mid.individual.net>, Jolly Roger
total cost: $0
<jolly...@pobox.com> wrote:
> >> > the first thing to try is get rid of the belkin dock. belkin relabels
> >> > cheap chinese crap.
> >>
> >> May be the ultimate solution, but definitely NOT the first thing.
> >
> > absolutely the first thing to try.
> >
> >> You are suggesting I spend a great deal of money when the answer may be
> >> something much simpler.
> >
> > what money?
> >
> > according to what i found online, that display supports hdmi and
> > minidisplayport.
>
> And according to Dell, it comes with a DisplayPort cable in the box:
>
> <http://www.dell.com/ed/business/p/dell-u2414h/pd>
even better.
> >> > the first thing to try is get rid of the belkin dock. belkin relabels
> >> > cheap chinese crap.
> >>
> >> May be the ultimate solution, but definitely NOT the first thing.
> >
> > absolutely the first thing to try.
> >
> >> You are suggesting I spend a great deal of money when the answer may be
> >> something much simpler.
> >
> > what money?
> >
> > according to what i found online, that display supports hdmi and
> > minidisplayport.
>
> And according to Dell, it comes with a DisplayPort cable in the box:
>
> <http://www.dell.com/ed/business/p/dell-u2414h/pd>
total cost: $0
Wade Garrett
Apr 25, 2018, 3:46:10 PM4/25/18
to
--
The fastest way to stop a bad guy with a gun is a good guy with a gun.
Daniel Cohen
Apr 26, 2018, 3:09:57 AM4/26/18
to
nospam <nos...@nospam.invalid> wrote:
> In article <fkbo3o...@mid.individual.net>, Jolly Roger
> <jolly...@pobox.com> wrote:
>
> > >> > the first thing to try is get rid of the belkin dock. belkin relabels
> > >> > cheap chinese crap.
> > >>
> > >> May be the ultimate solution, but definitely NOT the first thing.
> > >
> > > absolutely the first thing to try.
> > >
> > >> You are suggesting I spend a great deal of money when the answer may be
> > >> something much simpler.
> > >
> > > what money?
> > >
> > > according to what i found online, that display supports hdmi and
> > > minidisplayport.
> >
> > And according to Dell, it comes with a DisplayPort cable in the box:
> >
> > <http://www.dell.com/ed/business/p/dell-u2414h/pd>
>
> even better.
>
> total cost: $0
Well, yes, for diagnosis, that's fine. But it would mean not having my
> In article <fkbo3o...@mid.individual.net>, Jolly Roger
> <jolly...@pobox.com> wrote:
>
> > >> > the first thing to try is get rid of the belkin dock. belkin relabels
> > >> > cheap chinese crap.
> > >>
> > >> May be the ultimate solution, but definitely NOT the first thing.
> > >
> > > absolutely the first thing to try.
> > >
> > >> You are suggesting I spend a great deal of money when the answer may be
> > >> something much simpler.
> > >
> > > what money?
> > >
> > > according to what i found online, that display supports hdmi and
> > > minidisplayport.
> >
> > And according to Dell, it comes with a DisplayPort cable in the box:
> >
> > <http://www.dell.com/ed/business/p/dell-u2414h/pd>
>
> even better.
>
> total cost: $0
external drives connected for a while, which would be a hassle.
If I find the issue annoys me enough (most of the time everything is
fine, but just from time to time it happens), that's what I will have to
try.
Any equipment can fail over the years,, though most fail early if they
are going to fail, so it could be the Belkin or the cables.
But it has been solid until recently, and I think the change occurred
after the upgrade to 10.13.4
>
> > > you said your mac is a 2011 macbook pro, which has thunderbolt &
> > > mini-displayport in the same connector.
> >
> > So he can connect it straight to the computer.
> >
> > > if it solves the problem, you know it's the belkin. if not, then
> > > further investigation is needed.
> >
> > Yep.
> > > you said your mac is a 2011 macbook pro, which has thunderbolt &
> > > mini-displayport in the same connector.
> >
> > So he can connect it straight to the computer.
> >
> > > if it solves the problem, you know it's the belkin. if not, then
> > > further investigation is needed.
> >
> > Yep.
MartinC
Apr 26, 2018, 7:27:57 AM4/26/18
to
Am 25.04.18 um 09:15 schrieb Daniel Cohen:
> Most of the time this works fine, but recently (not sure if it started
> when I went to 10.13.4 or whether it had happened on 10.13.3) the
> monitor sometimes refuses to wake up when I wake the computer from
> sleep. That is, the monitor insists on remaining in Power Save mode, and
> in fact says "entering power save mode" when the computer wakes.
This happens here with a MacPro 2013 and an EIZO monitor (Thunderbolt),
about once or twice a month.
I did a google search for it and found that it happened quite frequently
in the past to a lot of people. At that time EIZO claimed that it's a
problem on the Apple side of Thunderbolt, and Apple claimed it's on the
EIZO end of the cable. Since it went away for the majority, someone
probably fixed something, somewhere, sometime.
Anyway, it does happen here rarely every now and then, and after some
more troublesome attempts like re-booting, unplugging cables I
eventually found out that a simple second "wake up call" to the monitor
always fixes it.
So if it stays black, I just hit CTRL-SHIFT-EJECT (which triggers the
screen energy saver) followed by "any key" to wake it up again.
This takes 2 seconds and never failed, so I actually just do it now once
every two weeks without really thinking about it anymore...
> Most of the time this works fine, but recently (not sure if it started
> when I went to 10.13.4 or whether it had happened on 10.13.3) the
> monitor sometimes refuses to wake up when I wake the computer from
> sleep. That is, the monitor insists on remaining in Power Save mode, and
> in fact says "entering power save mode" when the computer wakes.
about once or twice a month.
I did a google search for it and found that it happened quite frequently
in the past to a lot of people. At that time EIZO claimed that it's a
problem on the Apple side of Thunderbolt, and Apple claimed it's on the
EIZO end of the cable. Since it went away for the majority, someone
probably fixed something, somewhere, sometime.
Anyway, it does happen here rarely every now and then, and after some
more troublesome attempts like re-booting, unplugging cables I
eventually found out that a simple second "wake up call" to the monitor
always fixes it.
So if it stays black, I just hit CTRL-SHIFT-EJECT (which triggers the
screen energy saver) followed by "any key" to wake it up again.
This takes 2 seconds and never failed, so I actually just do it now once
every two weeks without really thinking about it anymore...
nospam
Apr 26, 2018, 10:31:39 AM4/26/18
to
In article <1nnust8.msdtdz1fj2a8xN%dcohe...@talktalk.net>, Daniel
once you know what's causing it, you know what needs to be replaced.
> But it would mean not having my
> external drives connected for a while, which would be a hassle.
only until you isolate the problem.
you may be able to connect them in some other way until you figure out
what's going on.
> If I find the issue annoys me enough (most of the time everything is
> fine, but just from time to time it happens), that's what I will have to
> try.
intermittent problems are difficult to diagnose and most annoying.
> Any equipment can fail over the years,, though most fail early if they
> are going to fail, so it could be the Belkin or the cables.
a hub is more likely to fail than a cable.
> But it has been solid until recently, and I think the change occurred
> after the upgrade to 10.13.4
10.13.4 is unlikely to have made a difference.
Cohen <dcohe...@talktalk.net> wrote:
> > > >
> > > >> You are suggesting I spend a great deal of money when the answer may be
> > > >> something much simpler.
> > > >
> > > > what money?
> > > >
> > > > according to what i found online, that display supports hdmi and
> > > > minidisplayport.
> > >
> > > And according to Dell, it comes with a DisplayPort cable in the box:
> > >
> > > <http://www.dell.com/ed/business/p/dell-u2414h/pd>
> >
> > even better.
> >
> > total cost: $0
>
> Well, yes, for diagnosis, that's fine.
that's the point - diagnose the problem.
> > > >
> > > >> You are suggesting I spend a great deal of money when the answer may be
> > > >> something much simpler.
> > > >
> > > > what money?
> > > >
> > > > according to what i found online, that display supports hdmi and
> > > > minidisplayport.
> > >
> > > And according to Dell, it comes with a DisplayPort cable in the box:
> > >
> > > <http://www.dell.com/ed/business/p/dell-u2414h/pd>
> >
> > even better.
> >
> > total cost: $0
>
> Well, yes, for diagnosis, that's fine.
once you know what's causing it, you know what needs to be replaced.
> But it would mean not having my
> external drives connected for a while, which would be a hassle.
you may be able to connect them in some other way until you figure out
what's going on.
> If I find the issue annoys me enough (most of the time everything is
> fine, but just from time to time it happens), that's what I will have to
> try.
> Any equipment can fail over the years,, though most fail early if they
> are going to fail, so it could be the Belkin or the cables.
> But it has been solid until recently, and I think the change occurred
> after the upgrade to 10.13.4
Daniel Cohen
Apr 27, 2018, 2:30:21 AM4/27/18
to
MartinC <nor...@nospam.invalid> wrote:
> Anyway, it does happen here rarely every now and then, and after some
> more troublesome attempts like re-booting, unplugging cables I
> eventually found out that a simple second "wake up call" to the monitor
> always fixes it.
>
> So if it stays black, I just hit CTRL-SHIFT-EJECT (which triggers the
> screen energy saver) followed by "any key" to wake it up again.
I've had various sensible suggestions about diagnosis. But they are
> Anyway, it does happen here rarely every now and then, and after some
> more troublesome attempts like re-booting, unplugging cables I
> eventually found out that a simple second "wake up call" to the monitor
> always fixes it.
>
> So if it stays black, I just hit CTRL-SHIFT-EJECT (which triggers the
> screen energy saver) followed by "any key" to wake it up again.
somewhat inconvenient.
At last I have a suggestion that is easy to try and with no downsides.
Chris Ridd
Apr 29, 2018, 6:20:04 AM4/29/18
to
support external GPUs, and I wonder if one of those changes has bitten you?
It has certainly bitten some DisplayLink users:
https://support.displaylink.com/knowledgebase/articles/1849327-important-information-on-macos-10-13-4-update
--
Chris
Daniel Cohen
Apr 29, 2018, 2:15:22 PM4/29/18
to
Chris Ridd <chri...@mac.com> wrote:
> There were some extensive graphics subsystem changes in 10.13.4 to
> support external GPUs, and I wonder if one of those changes has bitten you?
Could be. Do you know how I could test for that.
> There were some extensive graphics subsystem changes in 10.13.4 to
> support external GPUs, and I wonder if one of those changes has bitten you?
For the moment I am trying MartinC's suggestion, which is very easy if
it works.
Chris Ridd
Apr 30, 2018, 12:35:48 PM4/30/18
to
On 29/04/2018 19:15, Daniel Cohen wrote:
> Chris Ridd <chri...@mac.com> wrote:
>
>> There were some extensive graphics subsystem changes in 10.13.4 to
>> support external GPUs, and I wonder if one of those changes has bitten you?
>
> Could be. Do you know how I could test for that.
Sorry, not without looking into it more deeply.
> Chris Ridd <chri...@mac.com> wrote:
>
>> There were some extensive graphics subsystem changes in 10.13.4 to
>> support external GPUs, and I wonder if one of those changes has bitten you?
>
> Could be. Do you know how I could test for that.
> For the moment I am trying MartinC's suggestion, which is very easy if
> it works.
sent) can get your investigations going in the right direction.
--
Chris
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