From: Ali Bahrami <ali_gnu2@emvision.com>
To: Po Lu <luangruo@yahoo.com>
Cc: 69762@debbugs.gnu.org
Subject: bug#69762: X11 versions of Emacs 29 on sparc fail at startup
Date: Sat, 16 Mar 2024 19:13:34 -0600 [thread overview]
Message-ID: <9f9ddcf8-7e1e-48e9-9729-14d9036c2f1f@emvision.com> (raw)
In-Reply-To: <87plvusnbc.fsf@yahoo.com>
On 3/16/24 12:28 AM, Po Lu wrote:
> Ali Bahrami <ali_gnu2@emvision.com> writes:
>> With that in place, Lucid emacs starts, and runs normally.
>> This is clearly not a proper fix, but it is an effective
>> workaround, and presumably, no worse that using emacs 28.2,
>> which completely lacks sync fence support.
>>
>> I wonder if we might be looking at a problem with the
>> sync fence extension on sparc?
>
> That's more than likely, yes, though one wonders why Emacs is the first
> program to call attention to this problem. The only role of the
> drawable parameter to SyncCreateFence is as a reference to its screen,
> which is completely defeated if not even the screen's root window is
> deemed valid.
It's a good question, and I don't know the answer.
However, it's worth noting that it's been 20 years
since sparc machines came in desktop form, with a
display, so the number of people running X11 clients
on them likely isn't large. I myself usually use the
plain tty version in those contexts.
>
>> Although I now have usable way around the issue, I'm willing
>> to continue with any experiments you want to try. Let me
>> know...
>
> I don't think such a drastic measure is necessary under the
> circumstances. We should (please test) put this down as a bug in the
> X.Org server and install an error trap around SyncCreateFence requests,
> thus:
> Scratch that,
>
> diff --git a/src/xterm.c b/src/xterm.c
> index c8a43785564..2358918ac5b 100644
> --- a/src/xterm.c
> +++ b/src/xterm.c
> @@ -7292,6 +7292,7 @@ x_sync_init_fences (struct frame *f)
> && dpyinfo->xsync_minor < 1))
> return;
>
> + x_ignore_errors_for_next_request (dpyinfo, 0);
> output->sync_fences[0]
> = XSyncCreateFence (FRAME_X_DISPLAY (f),
> /* The drawable given below is only used to
> @@ -7303,6 +7304,7 @@ x_sync_init_fences (struct frame *f)
> = XSyncCreateFence (FRAME_X_DISPLAY (f),
> FRAME_X_WINDOW (f),
> False);
> + x_stop_ignoring_errors (dpyinfo);
>
> XChangeProperty (FRAME_X_DISPLAY (f), FRAME_OUTER_WINDOW (f),
> dpyinfo->Xatom_net_wm_sync_fences, XA_CARDINAL,
The x_ignore_errors_for_next_request() in 29.2 only
takes the dpyinfo argument. I dropped the second argument
from this patch, applied it, and it works. We could go with this,
rather than my
#ifdef __sparc
return
#endif
construct. It probably amounts to the same thing,
except that should a fixed XSyncCreateFence() come
along, this version would start using it.
Thanks!
- Ali
next prev parent reply other threads:[~2024-03-17 1:13 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-12 17:57 bug#69762: X11 versions of Emacs 29 on sparc fail at startup ali_gnu2
2024-03-13 0:34 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-13 17:02 ` ali_gnu2
2024-03-14 0:17 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-14 5:56 ` Ali Bahrami
2024-03-14 6:16 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-15 1:48 ` Ali Bahrami
2024-03-15 2:46 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-15 4:22 ` Ali Bahrami
2024-03-15 6:42 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-15 16:37 ` Ali Bahrami
2024-03-16 0:21 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-16 4:58 ` Ali Bahrami
2024-03-16 6:28 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-16 6:32 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-17 1:13 ` Ali Bahrami [this message]
2024-03-16 11:14 ` Eli Zaretskii
2024-03-16 12:24 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-17 1:38 ` ali_gnu2
2024-03-17 11:54 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-03-23 17:00 ` Alan Coopersmith
2024-04-03 17:48 ` Alan Coopersmith via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-06 10:34 ` Eli Zaretskii
2024-04-06 11:07 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
2024-04-06 16:36 ` ali_gnu2
2024-04-07 0:53 ` Po Lu via Bug reports for GNU Emacs, the Swiss army knife of text editors
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