Very Computer

by **Greg Jump** » Fri, 10 Dec 1993 05:48:14

After upgrading from Solaris 2.2 to 2.3 this week, my screen will no longer
unblank when striking a key or moving the mouse while "xlock" is on. The
problem occurs with the OpenWindows 3.3 "xlock" and the "screenblank" which is
available from "ftp.ee.lbl.gov".

Has anyone else seen/fixed this problem?
--
Thanks,

Greg Jumper
TRW Signal Processing Facility

by **Greg Jump** » Sat, 11 Dec 1993 00:50:06

In my previous post regarding this problem, I said that "screenblank" ignores
keyboard or mouse input when "xlock" is running. It turns out that "xlock" is
irrelevant -- after blanking the screen, "screenblank" ignores keyboard and
mouse events regardless of what else is running.

Still hoping someone has a fix...
--
Thanks,

Greg Jumper
TRW Signal Processing Facility

by **Casper H.S. D** » Thu, 16 Dec 1993 04:17:52

>In my previous post regarding this problem, I said that "screenblank" ignores
>keyboard or mouse input when "xlock" is running. It turns out that "xlock" is
>irrelevant -- after blanking the screen, "screenblank" ignores keyboard and
>mouse events regardless of what else is running.

What seems to have changed in 2.3 is the way poll() is called
by the X-server. Solaris 2.[0-2] xnews and the MIT R5 server all
call poll with a non-negative value as second argument.
Screenblank calls poll with -1 as second argum,ent.
The Solaris 2.3 Xsun (OW 3.3 Xsun) calls poll with a second argument
of -1 as well. For some reason, the kernel doesn't wake
screenblank up anymore (not until you hit return a couple
of time). I haven't tested the MIT R5 server on 2.3 yet,
but it could be that to calls of the form poll( ... , -1)
are the cause of the problem. (Or this can be seen as a kernel bug).

Or work-around is to disable screen blank when X is running.
(try to bind to port 6000, if it fails, X is running and
don't blank.)

Casper

by **Jef Poskanz** » Fri, 17 Dec 1993 03:37:24

}>irrelevant -- after blanking the screen, "screenblank" ignores keyboard and
}>mouse events regardless of what else is running.
}
}Screenblank calls poll with -1 as second argum,ent.
}The Solaris 2.3 Xsun (OW 3.3 Xsun) calls poll with a second argument
}of -1 as well.

Interesting. Thanks for the diagnosis.

Quote:}Or work-around is to disable screen blank when X is running.
}(try to bind to port 6000, if it fails, X is running and
}don't blank.)

A much easier temporary workaround is to just add -DHAVE_POLL=0 to
the Solaris 2 define in the Makefile. I have made this change in
the copy on ftp.ee.lbl.gov.
---
Jef

"There is nothing new under the sun, but there are lots of old things
we don't know yet." -- Ambrose Bierce

by **Scott R. Nels** » Thu, 23 Dec 1993 01:15:09

>A much easier temporary workaround is to just add -DHAVE_POLL=0 to
>the Solaris 2 define in the Makefile. I have made this change in
>the copy on ftp.ee.lbl.gov.

I would like to thank Jef for making screenblank work on Solaris 2.3.

It seems that usleep is not available under SVR4. If you don't have
the ucb extensions or gcc installed on your machine, you can replace
the usleep command on line 481 with the following:

struct timeval timeout;

timeout.tv_sec = 0;
timeout.tv_usec = BLANKING_MSECS * 1000;
(void) select(0, NULL, NULL, NULL, &timeout);

---

Sun Microsystems

"Proofread carefully to see if you any words out."

by **Jef Poskanz** » Thu, 23 Dec 1993 04:59:06

Quote:}It seems that usleep is not available under SVR4. If you don't have
}the ucb extensions or gcc installed on your machine, you can replace
}the usleep command on line 481 with the following:
} struct timeval timeout;
} timeout.tv_sec = 0;
} timeout.tv_usec = BLANKING_MSECS * 1000;
} (void) select(0, NULL, NULL, NULL, &timeout);

Thanks, fixed. Obviously if I had tried linking under Solaris
I would have found this myself. This time I checked.
---
Jef

"Scientists have utter disdain for engineering, and complete faith in
engineers." -- Jef Poskanzer

Very Computer

Screen doesn't unblank with "screenblank" and "xlock" under 2.3

Screen doesn't unblank with "screenblank" and "xlock" under 2.3

Screen doesn't unblank with "screenblank" and "xlock" under 2.3

Screen doesn't unblank with "screenblank" and "xlock" under 2.3

Screen doesn't unblank with "screenblank" and "xlock" under 2.3

Screen doesn't unblank with "screenblank" and "xlock" under 2.3

Screen doesn't unblank with "screenblank" and "xlock" under 2.3