GNU bug report logs - #36924
GDM, GNOME Shell, etc. break when there are stale caches

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Package: guix; Severity: important; Reported by: Ricardo Wurmus <rekado@HIDDEN>; dated Sun, 4 Aug 2019 21:02:02 UTC; Maintainer for guix is bug-guix@HIDDEN.

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From: L  p R n  d n    <guix@HIDDEN>
To: Andreas Enge <andreas@HIDDEN>
Subject: Re: bug#36924: Mesa/GDM/XFCE
References: <87tvawzlvq.fsf@HIDDEN> <20190912095430.GA1559@jurong>
 <874l1hpwti.fsf@HIDDEN> <20190916094454.GA1265@jurong>
Date: Mon, 16 Sep 2019 16:57:21 +0200
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 16 Sep 2019 11:44:54 +0200")
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Hello,

Andreas Enge <andreas@HIDDEN> writes:

> Hello,
>
> On Thu, Sep 12, 2019 at 01:40:09PM +0200, Ludovic Court=C3=A8s wrote:
>> Thanks for the report, Andreas!
>
> and thanks for the time spent putting me on the good track!
>
>> Andreas Enge <andreas@HIDDEN> skribis:
>> > xfwm4: ../mesa-19.1.4/src/mesa/drivers/dri/i965/intel_mipmap_tree.c:12=
93:
>> intel_miptree_match_image: Zusicherung =C2=BBimage->TexObject->Target =
=3D=3D
>> mt->target=C2=AB nicht erf=C3=BCllt.
>> That=E2=80=99s the likely root cause to me (in which case it may be unre=
lated to
>> this <https://issues.guix.gnu.org/issue/36924>, after all.)
>> I found these bug reports:
>>   https://bugs.freedesktop.org/show_bug.cgi?id=3D107117
>>   https://bugzilla.redhat.com/show_bug.cgi?id=3D1678334
>>=20
>> In both cases, Xfce and Mesa=E2=80=99s i965 drivers are involved, as is =
the case
>> on your machine.  The 2nd bug report includes an xfwm4 patch, even.
>
> The first one also contains a patch, but it has been integrated into later
> mesa releases, in particular the one we are using.
>
>> I wonder if Xfce before the recent updates (so before
>> 8549e0ca6fd68a57253471436de49b88b2d47e64) works better.
>> Andreas, if you feel like it, could you try:
>>   guix pull --commit=3D97ce5964fb5d52cf2151fea685e28fa23a98b264
>>   sudo guix system reconfigure =E2=80=A6
>
> Indeed, the problem disappears with this commit; I can log in and out
> and in again with xfce working. So I am cc-ing the author of the commits
> updating xfce, maybe they have an answer!

It seems some bugs have been introduced in xfwm4 between 4.12 and 4.14.
(All issues previously linked are for >=3D4.13 wich was the dev version of
4.14).
I found https://forum.xfce.org/viewtopic.php?id=3D13233 which seems
interesting. Please let us know if it changes anything.

I don't know what would be the correct way to deal with the problem in
guix though.

> And I will try to look at the patch in the second report you reference
> above.
>
> Thanks!
>
> Andreas

Have a nice day,

L  p r n  d n




Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

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Date: Mon, 16 Sep 2019 11:44:54 +0200
From: Andreas Enge <andreas@HIDDEN>
To: Ludovic =?iso-8859-15?Q?Court=E8s?= <ludo@HIDDEN>
Subject: Re: bug#36924: Mesa/GDM/XFCE
Message-ID: <20190916094454.GA1265@jurong>
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Hello,

On Thu, Sep 12, 2019 at 01:40:09PM +0200, Ludovic Courtès wrote:
> Thanks for the report, Andreas!

and thanks for the time spent putting me on the good track!

> Andreas Enge <andreas@HIDDEN> skribis:
> > xfwm4: ../mesa-19.1.4/src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1293: intel_miptree_match_image: Zusicherung »image->TexObject->Target == mt->target« nicht erfüllt.
> That’s the likely root cause to me (in which case it may be unrelated to
> this <https://issues.guix.gnu.org/issue/36924>, after all.)
> I found these bug reports:
>   https://bugs.freedesktop.org/show_bug.cgi?id=107117
>   https://bugzilla.redhat.com/show_bug.cgi?id=1678334
> 
> In both cases, Xfce and Mesa’s i965 drivers are involved, as is the case
> on your machine.  The 2nd bug report includes an xfwm4 patch, even.

The first one also contains a patch, but it has been integrated into later
mesa releases, in particular the one we are using.

> I wonder if Xfce before the recent updates (so before
> 8549e0ca6fd68a57253471436de49b88b2d47e64) works better.
> Andreas, if you feel like it, could you try:
>   guix pull --commit=97ce5964fb5d52cf2151fea685e28fa23a98b264
>   sudo guix system reconfigure …

Indeed, the problem disappears with this commit; I can log in and out
and in again with xfce working. So I am cc-ing the author of the commits
updating xfce, maybe they have an answer!

And I will try to look at the patch in the second report you reference
above.

Thanks!

Andreas





Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

Message received at 36924 <at> debbugs.gnu.org:


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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Andreas Enge <andreas@HIDDEN>
Subject: Re: bug#36924: Mesa/GDM/XFCE
References: <87tvawzlvq.fsf@HIDDEN> <20190912095430.GA1559@jurong>
Date: Thu, 12 Sep 2019 13:40:09 +0200
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Hallo!

Thanks for the report, Andreas!

Andreas Enge <andreas@HIDDEN> skribis:

> xfwm4: ../mesa-19.1.4/src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1293:=
 intel_miptree_match_image: Zusicherung =C2=BBimage->TexObject->Target =3D=
=3D mt->target=C2=AB nicht erf=C3=BCllt.

That=E2=80=99s the likely root cause to me (in which case it may be unrelat=
ed to
this <https://issues.guix.gnu.org/issue/36924>, after all.)

I found these bug reports:

  https://bugs.freedesktop.org/show_bug.cgi?id=3D107117
  https://bugzilla.redhat.com/show_bug.cgi?id=3D1678334

In both cases, Xfce and Mesa=E2=80=99s i965 drivers are involved, as is the=
 case
on your machine.  The 2nd bug report includes an xfwm4 patch, even.

I wonder if Xfce before the recent updates (so before
8549e0ca6fd68a57253471436de49b88b2d47e64) works better.

Andreas, if you feel like it, could you try:

  guix pull --commit=3D97ce5964fb5d52cf2151fea685e28fa23a98b264
  sudo guix system reconfigure =E2=80=A6

?

Thanks,
Ludo=E2=80=99.




Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

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Date: Thu, 12 Sep 2019 11:54:30 +0200
From: Andreas Enge <andreas@HIDDEN>
To: 36924 <at> debbugs.gnu.org
Subject: Mesa/GDM/XFCE
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Hello,

now it is my turn to experience a problem in this area. I newly installed a
machine with the graphical installer of Guix 1.0.1 (where I could use xfce
without problem), then I issued a "guix pull" and a "guix system reconfigure".

Now logging into XFCE poses problems, which I can reproduce as follows
(after removing /var/lib/gdm, $HOME/{.config,.cache,.local} once):
- When I remove $HOME/.config/xfce4/xfconf/xfce-perchannel-xml/xfwm4.xml
  I can log into XFCE once.
- The second time, various problems may occur: The terminal, which was open
  before opens, but does not receive focus so I cannot type, and the windows
  decorations for closing it are absent; or the xfce panel is absent.
- Then I remove $HOME/.config/xfce4/xfconf/xfce-perchannel-xml/xfwm4.xml
  again, and can log in once more.
And so on.

The following lines in $HOME/.cache/gdm/session.log appear when there is
a problem:

xfwm4: ../mesa-19.1.4/src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1293: intel_miptree_match_image: Zusicherung image->TexObject->Target == mt->target nicht erfllt.
(nm-applet:8046): nm-applet-WARNING **: 11:23:52.630: GDBus.Error:org.freedesktop.NetworkManager.AgentManager.PermissionDenied: An agent with this ID is already registered for this user.
xfwm4: ../mesa-19.1.4/src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1293: intel_miptree_match_image: Zusicherung image->TexObject->Target == mt->target nicht erfllt.
(nm-applet:8046): Gdk-CRITICAL **: 11:23:53.035: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed
xfwm4: ../mesa-19.1.4/src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1293: intel_miptree_match_image: Zusicherung image->TexObject->Target == mt->target nicht erfllt.
(nm-applet:8046): Gdk-CRITICAL **: 11:23:53.357: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed
xfwm4: ../mesa-19.1.4/src/mesa/drivers/dri/i965/intel_mipmap_tree.c:1293: intel_miptree_match_image: Zusicherung image->TexObject->Target == mt->target nicht erfllt.
(nm-applet:8046): Gdk-CRITICAL **: 11:23:53.441: gdk_window_thaw_toplevel_updates: assertion 'window->update_and_descendants_freeze_count > 0' failed
(xfconfd:7966): xfconfd-CRITICAL **: 11:23:58.040: Name org.xfce.Xfconf lost on the message dbus, exiting.
(Thunar:8030): thunar-WARNING **: 11:23:58.041: Name org.xfce.FileManager auf dem Nachrichten-dbus verloren.
(tumblerd:8023): tumblerd-CRITICAL **: 11:23:58.041: Name org.freedesktop.thumbnails.Cache1 lost on the message dbus, exiting.
(Thunar:8030): thunar-WARNING **: 11:23:58.041: Name org.freedesktop.FileManager1 auf dem Nachrichten-dbus verloren.
(tumblerd:8023): tumblerd-CRITICAL **: 11:23:58.041: Name org.freedesktop.thumbnails.Manager1 lost on the message dbus, exiting.
(tumblerd:8023): tumblerd-CRITICAL **: 11:23:58.041: Name org.freedesktop.thumbnails.Thumbnailer1 lost on the message dbus, exiting.

Sorry for the German, but you also have the translation:
"Zusicherung ... nicht erfllt" = "assertion ... failed"
"auf dem Nachrichten-dbus verloren" = "lost on the message dbus"

Andreas





Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.
Changed bug title to 'GDM, GNOME Shell, etc. break when there are stale caches' from 'fixing GDM + GNOME Shell' Request was from Ludovic Courtès <ludo@HIDDEN> to control <at> debbugs.gnu.org. Full text available.
Severity set to 'important' from 'normal' Request was from Ludovic Courtès <ludo@HIDDEN> to control <at> debbugs.gnu.org. Full text available.

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From: Timothy Sample <samplet@HIDDEN>
To: Ricardo Wurmus <rekado@HIDDEN>
Subject: Re: fixing GDM + GNOME Shell
References: <87tvawzlvq.fsf@HIDDEN> <87k1bqgtn1.fsf@HIDDEN>
 <87sgqexj2k.fsf@HIDDEN>
Date: Wed, 07 Aug 2019 22:59:58 -0400
In-Reply-To: <87sgqexj2k.fsf@HIDDEN> (Ricardo Wurmus's message of "Tue,
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Hello,

Ricardo Wurmus <rekado@HIDDEN> writes:

> Mark H Weaver <mhw@HIDDEN> writes:
>
>> It's interesting that I've never run into this problem, not even once,
>> in all my years of running GNOME on Guix systems.  Since recently
>> reverting to mostly using GNOME under X and GDM (whereas for a while I
>> was mostly launching GNOME manually under Wayland), I've run into some
>> other problems, e.g. GDM suspending my system automatically, sometimes
>> immediately after logging out, but I've *never* had to remove my caches.
>
> Interesting.

FWIW, I=E2=80=99m having the same good luck as Mark.  Other than the upgrade
from 3.24 to 3.28, I=E2=80=99ve never had this kind of trouble with GNOME a=
nd
GDM.  And even then, IIRC, the issue wasn=E2=80=99t really with the state f=
iles
(deleting them just happened to serve as a temporary work-around).


-- Tim




Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

Message received at 36924 <at> debbugs.gnu.org:


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From: Ricardo Wurmus <rekado@HIDDEN>
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Subject: Re: fixing GDM + GNOME Shell
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Mark H Weaver <mhw@HIDDEN> writes:

> It's interesting that I've never run into this problem, not even once,
> in all my years of running GNOME on Guix systems.  Since recently
> reverting to mostly using GNOME under X and GDM (whereas for a while I
> was mostly launching GNOME manually under Wayland), I've run into some
> other problems, e.g. GDM suspending my system automatically, sometimes
> immediately after logging out, but I've *never* had to remove my caches.

Interesting.

> I wonder if this is related to my use of Btrfs instead of Ext4.  Whereas
> system crashes cause file system corruptions under Ext4 (usually in the
> form of some files being left empty after a crash), I've never seen any
> evidence of corruption from crashes under Btrfs.

I haven=E2=80=99t had a system crash on this machine.  I didn=E2=80=99t use=
 it for a
month, upgraded, rebooted, and then had GDM + GNOME Shell problems.

--=20
Ricardo





Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

Message received at 36924 <at> debbugs.gnu.org:


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From: Mark H Weaver <mhw@HIDDEN>
To: Ricardo Wurmus <rekado@HIDDEN>
Subject: Re: fixing GDM + GNOME Shell
References: <87tvawzlvq.fsf@HIDDEN>
Date: Tue, 06 Aug 2019 12:12:07 -0400
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 04 Aug 2019 23:00:41 +0200")
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Hi Ricardo,

Ricardo Wurmus <rekado@HIDDEN> writes:

> Today I again couldn=E2=80=99t log into my workstation after upgrading the
> system.  I=E2=80=99m using GDM + GNOME Shell.
>
> At first GDM wouldn=E2=80=99t start.  I knew what to do: remove /var/lib/=
gdm,
> because some state must have accumulated there.
>
> GDM came up after a reboot, but I still couldn=E2=80=99t log in.  Instead=
 I was
> thrown back to the login screen without any error message.  I looked in
> ~/.cache/gdm/session.log for information, but it only told me that
> gnome-shell was killed.  Thanks.
>
> After removing both .local/share and .cache out of the way I could log
> in again.
>
> This happens whenever I upgrade the system.  This makes the system
> rather frustrating to use.  I don=E2=80=99t know if booting into an older=
 system
> generation would result in the same problem, but my guess is that it
> would because both GDM and GNOME Shell appear to be leaving some binary
> files behind that cause different versions to crash unceremoneously.
>
> What can we do to make GDM and GNOME Shell more reliable?

It's interesting that I've never run into this problem, not even once,
in all my years of running GNOME on Guix systems.  Since recently
reverting to mostly using GNOME under X and GDM (whereas for a while I
was mostly launching GNOME manually under Wayland), I've run into some
other problems, e.g. GDM suspending my system automatically, sometimes
immediately after logging out, but I've *never* had to remove my caches.

I wonder if this is related to my use of Btrfs instead of Ext4.  Whereas
system crashes cause file system corruptions under Ext4 (usually in the
form of some files being left empty after a crash), I've never seen any
evidence of corruption from crashes under Btrfs.

       Mark




Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

Message received at 36924 <at> debbugs.gnu.org:


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From: Ricardo Wurmus <rekado@HIDDEN>
To: Efraim Flashner <efraim@HIDDEN>
Subject: Re: fixing GDM + GNOME Shell
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Efraim Flashner <efraim@HIDDEN> writes:

> On Sun, Aug 04, 2019 at 11:00:41PM +0200, Ricardo Wurmus wrote:
>> Hi Guix,
>>
>> Today I again couldn=E2=80=99t log into my workstation after upgrading t=
he
>> system.  I=E2=80=99m using GDM + GNOME Shell.
>>
>> At first GDM wouldn=E2=80=99t start.  I knew what to do: remove /var/lib=
/gdm,
>> because some state must have accumulated there.
>
> For this one can we create a single-shot service that, on reconfigure or
> boot, removes this directory and recreates it? In fact, it seems this is
> basically what Debian does=C2=B9.

I suggested as much earlier, but it seems like a hack.  Is this how
GNOME expects this state directory to be handled?  The fact that Debian
does this is reassuring (or not=E2=80=A6), but I would very much like to av=
oid
adding even more hacks.

>> GDM came up after a reboot, but I still couldn=E2=80=99t log in.  Instea=
d I was
>> thrown back to the login screen without any error message.  I looked in
>> ~/.cache/gdm/session.log for information, but it only told me that
>> gnome-shell was killed.  Thanks.
>>
>> After removing both .local/share and .cache out of the way I could log
>> in again.
>
> This part seems a little harder to automate. /etc/skel is only sourced
> when a user is created, so it's hard to make sweeping changes to help
> people in this case, if they even want automated help. I'm guessing
> making .cache/gdm(?) read-only would create other issues.

Does anyone know why this happens at all?  What are the cached data?
Can we do without?

>> What can we do to make GDM and GNOME Shell more reliable?
>
> Modify the logout scripts to remove a users' .cache file seems extreme.
> Some of the other options, such as removing and recreating directories
> would address other issues we've had (such as /var/cache/fontconfig).

In my opinion generating a global /var/cache/fontconfig should be
prevented; removing it seems again like an avoidable hack.

--
Ricardo





Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

Message received at submit <at> debbugs.gnu.org:


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From: Efraim Flashner <efraim@HIDDEN>
To: Ricardo Wurmus <rekado@HIDDEN>
Subject: Re: fixing GDM + GNOME Shell
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On Sun, Aug 04, 2019 at 11:00:41PM +0200, Ricardo Wurmus wrote:
> Hi Guix,
>=20
> Today I again couldn=E2=80=99t log into my workstation after upgrading the
> system.  I=E2=80=99m using GDM + GNOME Shell.
>=20
> At first GDM wouldn=E2=80=99t start.  I knew what to do: remove /var/lib/=
gdm,
> because some state must have accumulated there.

For this one can we create a single-shot service that, on reconfigure or
boot, removes this directory and recreates it? In fact, it seems this is
basically what Debian does=C2=B9.

>=20
> GDM came up after a reboot, but I still couldn=E2=80=99t log in.  Instead=
 I was
> thrown back to the login screen without any error message.  I looked in
> ~/.cache/gdm/session.log for information, but it only told me that
> gnome-shell was killed.  Thanks.
>=20
> After removing both .local/share and .cache out of the way I could log
> in again.

This part seems a little harder to automate. /etc/skel is only sourced
when a user is created, so it's hard to make sweeping changes to help
people in this case, if they even want automated help. I'm guessing
making .cache/gdm(?) read-only would create other issues.

>=20
> This happens whenever I upgrade the system.  This makes the system
> rather frustrating to use.  I don=E2=80=99t know if booting into an older=
 system
> generation would result in the same problem, but my guess is that it
> would because both GDM and GNOME Shell appear to be leaving some binary
> files behind that cause different versions to crash unceremoneously.
>=20
> What can we do to make GDM and GNOME Shell more reliable?

Modify the logout scripts to remove a users' .cache file seems extreme.
Some of the other options, such as removing and recreating directories
would address other issues we've had (such as /var/cache/fontconfig).


=C2=B9 https://sources.debian.org/src/gdm3/3.30.2-3/debian/gdm3.postinst/#L=
76

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Information forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.

Message received at submit <at> debbugs.gnu.org:


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Subject: fixing GDM + GNOME Shell
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Hi Guix,

Today I again couldn=E2=80=99t log into my workstation after upgrading the
system.  I=E2=80=99m using GDM + GNOME Shell.

At first GDM wouldn=E2=80=99t start.  I knew what to do: remove /var/lib/gd=
m,
because some state must have accumulated there.

GDM came up after a reboot, but I still couldn=E2=80=99t log in.  Instead I=
 was
thrown back to the login screen without any error message.  I looked in
~/.cache/gdm/session.log for information, but it only told me that
gnome-shell was killed.  Thanks.

After removing both .local/share and .cache out of the way I could log
in again.

This happens whenever I upgrade the system.  This makes the system
rather frustrating to use.  I don=E2=80=99t know if booting into an older s=
ystem
generation would result in the same problem, but my guess is that it
would because both GDM and GNOME Shell appear to be leaving some binary
files behind that cause different versions to crash unceremoneously.

What can we do to make GDM and GNOME Shell more reliable?

--
Ricardo





Acknowledgement sent to Ricardo Wurmus <rekado@HIDDEN>:
New bug report received and forwarded. Copy sent to bug-guix@HIDDEN. Full text available.
Report forwarded to bug-guix@HIDDEN:
bug#36924; Package guix. Full text available.
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