Bug#495435: xterm: Window resize race condition
Tobias Diedrich
Version: 235-1
Severity: normal
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Hash: SHA1
When I resize xterm while vim oder mutt or some other program is running
in it (probably also bash, but it's not that visible there), the program
does not resize to the new window size, but to the last window size.
I.e. I start xterm and it's 80x24. I then start mutt and resize to
90x24, but mutt stays at 80x24. I resize again to 100x24 and mutt goes
to 90x24. Again to 60x24 and mutt goes to 100x24. And so on.
Unfortunately this seems to be a rather sporadic bug.
It looks like when the program gets SIGWINCH and queries the new window
size it still gets the old size from xterm. (race condition?)
When I manually send another SIGWINCH to the program it resizes to the
correct current xterm size.
- -- System Information:
Debian Release: lenny/sid
APT prefers testing
APT policy: (9999, 'testing'), (990, 'unstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.27-rc3 (PREEMPT)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages xterm depends on:
ii libc6 2.7-13 GNU C Library: Shared libraries
ii libfontconfig1 2.6.0-1 generic font configuration library
ii libice6 2:1.0.4-1 X11 Inter-Client Exchange library
ii libncurses5 5.6+20080713-1 shared libraries for terminal hand
ii libsm6 2:1.0.3-2 X11 Session Management library
ii libx11-6 2:1.1.4-2 X11 client-side library
ii libxaw7 2:1.0.4-2 X11 Athena Widget library
ii libxext6 2:1.0.4-1 X11 miscellaneous extension librar
ii libxft2 2.1.12-3 FreeType-based font drawing librar
ii libxmu6 2:1.0.4-1 X11 miscellaneous utility library
ii libxt6 1:1.0.5-3 X11 toolkit intrinsics library
ii xbitmaps 1.0.1-2 Base X bitmaps
Versions of packages xterm recommends:
ii x11-utils 7.3+2 X11 utilities
ii xutils 1:7.3+15 X Window System utility programs m
Versions of packages xterm suggests:
pn xfonts-cyrillic <none> (no description available)
- -- no debconf information
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Thomas Dickey
> Package: xterm
> Version: 235-1
> Severity: normal
>
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
>
> When I resize xterm while vim oder mutt or some other program is running
> in it (probably also bash, but it's not that visible there), the program
> does not resize to the new window size, but to the last window size.
> I.e. I start xterm and it's 80x24. I then start mutt and resize to
> 90x24, but mutt stays at 80x24. I resize again to 100x24 and mutt goes
> to 90x24. Again to 60x24 and mutt goes to 100x24. And so on.
>
> Unfortunately this seems to be a rather sporadic bug.
:-(
> It looks like when the program gets SIGWINCH and queries the new window
> size it still gets the old size from xterm. (race condition?)
any other clues would be helpful. Usually I'm using fvwm and tcsh (and
don't see any problems). Both the window manager and the shell have some
influence.
--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net
Alexander E. Patrakov
Looks exactly like this kernel problem: http://lkml.org/lkml/2008/8/11/538 -
please confirm my testing under different kernel versions
--
Alexander E. Patrakov
Thomas Dickey
> Looks exactly like this kernel problem: http://lkml.org/lkml/2008/8/11/538 -
> please confirm my testing under different kernel versions
My kernel version is older (2.6.15).
Tobias Diedrich
> Thomas Dickey wrote:
>
> > On Sun, Aug 17, 2008 at 02:30:15PM +0200, Tobias Diedrich wrote:
> >> Package: xterm
> >> Version: 235-1
> >> Severity: normal
> >>
> >> -----BEGIN PGP SIGNED MESSAGE-----
> >> Hash: SHA1
> >>
> >>
> >> When I resize xterm while vim oder mutt or some other program is running
> >> in it (probably also bash, but it's not that visible there), the program
> >> does not resize to the new window size, but to the last window size.
> >> I.e. I start xterm and it's 80x24. I then start mutt and resize to
> >> 90x24, but mutt stays at 80x24. I resize again to 100x24 and mutt goes
> >> to 90x24. Again to 60x24 and mutt goes to 100x24. And so on.
> >>
> >> Unfortunately this seems to be a rather sporadic bug.
> >
> > :-(
> >
> >> It looks like when the program gets SIGWINCH and queries the new window
> >> size it still gets the old size from xterm. (race condition?)
> >
> > any other clues would be helpful. Usually I'm using fvwm and tcsh (and
> > don't see any problems). Both the window manager and the shell have some
> > influence.
>
> Looks exactly like this kernel problem: http://lkml.org/lkml/2008/8/11/538 -
> please confirm my testing under different kernel versions
That sounds exactly like what I'm seeing (running 2.6.27-rc3 here).
I'll test with an older kernel in the evening...
--
Tobias PGP: http://9ac7e0bc.uguu.de
このメールは十割再利用されたビットで作られています。
Tobias Diedrich
> > Looks exactly like this kernel problem: http://lkml.org/lkml/2008/8/11/538 -
> > please confirm my testing under different kernel versions
>
> That sounds exactly like what I'm seeing (running 2.6.27-rc3 here).
> I'll test with an older kernel in the evening...
So far 2.6.26 has behaved normal, I'm not seeing the bug with this
kernel version.
HTH,