Window is blank

[Vadim Peretokin]

It broke. I don't know why or how, but it did.

I imagine it'll be fixed after a restart...

Ubuntu KK, PPA

[X (u78qir8a9-deactivatedaccount)]

Hi, I've seen this on rare occations too. If you find a good recipe for reproduction, let me know. I'll try as well, this is a pretty bad bug if it hits many users.

I think it must be something with GTK that changed in v2.18 or so.

[X (u78qir8a9-deactivatedaccount)]

I've seen this rarely before, but now I have found where it comes from I think:

1. Show the third pane ("indirect object pane"), for example Desktop -> Open With.. -> (Don't need to select anything here)
2. Press and hold Ctrl+Space or other shortcut so that the window flashes show/hide, until it blanks.

Isolated to this line of code.. progress so far, now we just have to find out why showing this widget in the wrong moment blanks.

[X (u78qir8a9-deactivatedaccount)]

That diff is simply illustration. It's not a fix!

[Vadim Peretokin (vperetokin)]

Actually the Kupfer window does not come up when I have any menus open.

[X (u78qir8a9-deactivatedaccount)]

I think I struck gold while working on something different (of course, the hours I used aimed directly at fixing this bug were fruitless).

This latest git change (or later) and the issue should be no more:

http://git.gnome.org/cgit/kupfer/commit/?id=2fddd2930e08ce24692588afc4921ce3366065b8

It is a workaround of this bug, or rather the removal of a different workaround for the window position.

[Vadim Peretokin (vperetokin)]

Well, I haven't ran into it yet, will let you know if I ever do again.

[X (u78qir8a9-deactivatedaccount)]

It fixed the only way I had of reproducing it, but I have found a new way. In Kupfer: "Write some text" -> Large Type, then quickly somehow show Kupfer again. Often this leads to a blank window.

[X (u78qir8a9-deactivatedaccount)]

I have checked in changes to mitigate this bug so far that I want to mark this as fixed.

Notes for future reference:
Removing any window size change on show/hide (activate/put_away) will remove this issue. It is still reproducible by showing the third pane, then pressing and holding Kupfer's keybinding to flicker the window quickly a lot of times.

[Vadim Peretokin (vperetokin)]

Is this fix released? In "0+c19.1-0kupferhope1~karmic1", I'm running into this issue again - after resuming from a suspend is the cause for me. I'm not sure how to restart Kupfer either.

[X (u78qir8a9-deactivatedaccount)]

I committed some changes directly intended to mitigate this bug, but it seems it can still come back. I have seen it again, although the ways I invented to reproduce the bug previously were all fixed.

So while 19.1 contained some changes to make the bug harder to hit (at least in my testing), the real bug cause still escapes me.. :-(

How to restart kupfer:

1. Activate Kupfer with launcher or keyboard shortcut.
2. Type Quit or press Ctrl+Q
3. Press space or down-arrow to show the result list, verifying that you selected the quit item.
4. Press Return to activate.

[Vadim Peretokin (vperetokin)]

Thank you

On Jan 13, 2010 4:56 PM, "Ulrik Sverdrup" <email address hidden> wrote:

I committed some changes directly intended to mitigate this bug, but it
seems it can still come back. I have seen it again, although the ways I
invented to reproduce the bug previously were all fixed.

So while 19.1 contained some changes to make the bug harder to hit (at
least in my testing), the real bug cause still escapes me.. :-(

How to restart kupfer:

1. Activate Kupfer with launcher or keyboard shortcut.
2. Type Quit or press Ctrl+Q
3. Press space or down-arrow to show the result list, verifying that you
selected the quit item.
4. Press Return to activate.

-- Window is blank https://bugs.launchpad.net/bugs/494237 You received this
bug notification becau...

[X (u78qir8a9-deactivatedaccount)]

Here is the latest commit directed at this problem: http://git.gnome.org/browse/kupfer/commit/?id=9618c57a565bb448e252e0170123b33e77c28678

Since the only weapon is the timing, it is unlikely that that's the last of this bug. If you ever see the bug again (in versions after that commit, which went in after c19.1, but before the next version), please mark this bug confirmed again.

[Vadim Peretokin (vperetokin)]

$ apt-cache policy kupfer
kupfer:
  Installed: 0+c19.1-0kupferhope1~karmic1
  Candidate: 0+c19.1-0kupferhope1~karmic1
  Version table:
 *** 0+c19.1-0kupferhope1~karmic1 0
        500 http://ppa.launchpad.net karmic/main Packages
        100 /var/lib/dpkg/status
     0+c10-1ubuntu1 0
        500 http://gpl.savoirfairelinux.net karmic/universe Packages
vadi@vadi-laptop:~/Downloads$

I got the blank window again after resuming from suspend. To note, this was probably the main reason for me behind the other blank Kupfers - it was blank after resuming.

[X (u78qir8a9-deactivatedaccount)]

to be honest the tested version is before, not after the most recent commit.

[X (u78qir8a9-deactivatedaccount)]

last pieces should be dead, in git master we don't do window resizing anymore.

[X (u78qir8a9-deactivatedaccount)]

I have seen this bug again, and tried to fix it again.

Newest try is this commit: http://git.gnome.org/browse/kupfer/commit/?id=0f80de2c09eca0c713a9ee3b31af92142c6459b2

(This commit is located in a development version after Kupfer v203 but before the release after that)

Any kupfer version after that where you see a window blanking -- please report it as a bug. I will close this old bug as fixed so that people file new bugs if something comes up.

[Vadim Peretokin (vperetokin)]

Okay.

[X (u78qir8a9-deactivatedaccount)]

And that didn't work at all :-) so here is the lastest try again and again.. well this time I actually had an idea, trying something different than race conditions at least.

http://git.gnome.org/browse/kupfer/commit/?id=3271a1d2a31a48457d167cd5bb9d52b21e1f37b8

[X (u78qir8a9-deactivatedaccount)]

Let's kill this bug once and for all. With v204, it's dead. Hooray! :-)

[Vadim Peretokin (vperetokin)]

Awesome