I think it's unlikely this bug will ever be solved, the warning is
good enough. While it's possible to work around maximum texture size
limitations, this does not come without overhead, and that's on old GPUs
with limited performance to start with. All modern and most not-that-
modern GPUs support
** Changed in: unity
Milestone: 5.6.0 = 5.8.0
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Title:
Max GL texture size can break multi-head
Status in Unity:
** Changed in: unity (Ubuntu)
Milestone: ubuntu-12.04-beta-1 = ubuntu-12.04-beta-2
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Title:
Max GL texture size
Gnome display manager now shows a warning message and prevents the user
form setting a resolution that is higher than the maximum supported.
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** Also affects: unity-distro-priority
Importance: Undecided
Status: New
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Title:
Max GL texture size can
** Branch linked: lp:ubuntu/gnome-desktop3
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Title:
Max GL texture size can break multi-head
Status in Unity:
** Changed in: unity (Ubuntu Precise)
Assignee: (unassigned) = Jay Taoko (jaytaoko)
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Title:
Max GL texture size
Does the remainder of this bug then be essentially dupe with bug
#830949?
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Title:
Max GL texture size can break
** Changed in: unity
Milestone: backlog = 5.6.0
** Changed in: unity (Ubuntu Precise)
Milestone: None = ubuntu-12.04-beta-1
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This bug was fixed in the package gnome-desktop3 - 3.3.5-0ubuntu1
---
gnome-desktop3 (3.3.5-0ubuntu1) precise; urgency=low
* Sync with Debian. Remaining changes:
* New upstream release.
- GnomeRR:
- Use GDK to get work area
- gnome_rr_screen_new() now creates a
** Tags added: rls-p-tracking
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Title:
Max GL texture size can break multi-head
Status in Unity:
Triaged
Status in
** Tags added: blocks-hwcert-enablement
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Title:
Max GL texture size can break multi-head
Status in Unity:
Triaged
I should note that the description is somewhat inaccurate:
1) Multi-head isn't really the problem, just the easiest way to reproduce it. A
single display with a high enough resolution can trigger it as well.
2) There are two separate limits: max texture size and max framebuffer size.
The former
** Changed in: unity
Importance: Critical = High
** Changed in: unity
Milestone: 4.8.0 = backlog
** Changed in: compiz (Ubuntu)
Importance: Critical = High
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** Tags removed: rls-mgr-o-tracking
** Tags added: rls-mgr-p-tracking
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Title:
Max GL texture size can break
** Description changed:
There's a longstanding issue (see the duplicate bug #555641) with Compiz
and multi-monitor setups with any combined dimension larger than the
maximum GL texture size. It used to be the case that this would simply
crash compiz, but mesa now has code to fallback to
Could that be related to:
https://bugs.launchpad.net/ubuntu/+source/nux/+bug/764044 ?
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Title:
Max GL texture size
Hi Chris,
I upgraded back to libgnome-desktop-3-2 3.2.0-0ubuntu2 and I am no
longer seeing the problem.
There are two other things that are different, though:
1. This time I turned the machine off instead of just doing a full
restart. I don't know if this resets the hardware in some special way
** Changed in: unity
Status: Invalid = Triaged
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Title:
Max GL texture size can break multi-head
Status in
I am sorry for the lack of details -- I just don't know what information
might be useful to provide. I don't even know if I should be filing a
new bug for this. Here's something to get started but I am happy to
provide more information if requested:
* I am not using a multi-head setup when this
Ok. It's known that checking GL attributes might cause a crash, which
is why it's done in a separate process, which shouldn't affect the main
login sequence. Why is this stopping login, I wonder?
Does a file in /var/crash get generated when you try to login? That
should contain useful
This is a rather big and not yet widely tested patch, but the only
option we have right now to prevent people from breaking their screen
config, so we need to take it. The error prone bits are in the separate
callout, so the impact of bugs there is indeed rather limited.
Thanks for working on
This bug was fixed in the package gnome-desktop3 - 3.2.0-0ubuntu2
---
gnome-desktop3 (3.2.0-0ubuntu2) oneiric; urgency=low
* debian/patches/02_refuse_to_break_GL_compositors.patch:
- Check whether Unity is running and if so refuse to configure a multi-head
setup larger
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