Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-03-03 Thread Matt Ruffalo
Hi Rik-

Thanks a lot for the additional information -- I wasn't sure whether
this was a transient issue which would work itself out with newer
package versions (like you described), or something that needed
developer attention ASAP to keep this problem from making its way into
the final release.

I ran 'apt update; apt full-upgrade' again, saw that there were some
newer versions of mesa-related packages which would be installed (in
addition to libegl1 and such), and took my chances with installing these
updates. After rebooting, everything is fine: full graphical performance.

Thank you again,
MMR...

On 2018-03-02 12:06, Rik Mills wrote:
> The issue is things building in -proposed picking up a dependency on
> libegl1 from libglvnd etc, but the version in -release is too old and
> acceleration breaks when it migrates to -release. Ideally such things
> should not migrate if they break things, but some oddities in this
> mesa/libglvnd transition mean that is not being prevented.
>
> Hopefully as soon as mesa and newer libglvnd migrate this will resolve
> itself.
>
> Don't have an ETA for that, but the ubuntu developers are aware and
> working on it
>
> Rik
>
> On 02/03/18 16:36, Matt Ruffalo wrote:
>> Hi Rik-
>>
>> I updated my system last night, and found bad/choppy graphical
>> performance again this morning. I don't know whether it's the same
>> issue, but 'apt full-upgrade' would do the following, and I haven't yet
>> had the chance to narrow anything down:
>>
>> """
>> root@isomorphic:~# apt full-upgrade
>> Reading package lists... Done
>> Building dependency tree  
>> Reading state information... Done
>> Calculating upgrade... Done
>> The following NEW packages will be installed:
>>   libegl1 libgdbm-compat4 libglvnd0
>> The following packages have been kept back:
>>   mp3splt
>> The following packages will be upgraded:
>>   debconf debconf-i18n default-jre default-jre-headless file
>> fonts-mathjax java-common
>>   language-pack-en libjavascriptcoregtk-4.0-18 libjs-mathjax
>> libkf5contacts-data
>>   libkf5contacts5 libkf5kdelibs4support-data libkf5kdelibs4support5
>> libkf5kdelibs4support5-bin
>>   libkf5plasma5 libkf5plasmaquick5 libmagic-mgc libmagic1 libmirclient9
>> libmircommon7
>>   libmircore1 libmirprotobuf3 libperl5.26 libseccomp2 libsnmp-base
>> libsnmp30 libsort-key-perl
>>   libtcl8.6 libwebkit2gtk-4.0-37 libwebkit2gtk-4.0-37-gtk2
>> linux-firmware mlocate perl
>>   perl-base perl-modules-5.26 plasma-framework python3-software-properties
>>   python3-update-manager python3-xapian signal-desktop
>> software-properties-common
>>   software-properties-kde tcl8.6 ucf unattended-upgrades
>> update-manager-core vim vim-common
>>   vim-runtime vim-tiny xserver-common xserver-xorg-core
>> xserver-xorg-legacy xxd
>> 55 upgraded, 3 newly installed, 0 to remove and 1 not upgraded.
>> """
>>
>> When I have some time, I'll see which packages are pulling in 'libegl1'
>> and 'libglvnd0'.
>>
>> Thank you,
>> MMR...
>>
>> On 2018-02-24 02:50, Rik Mills wrote:
>>> Yes, I uploaded a new version of kinfocenter which does not pull in the
>>> 2 packages I mentioned, at least until we get newer versions that work
>>> ok with the rest of our latest builds.
>>>
>>> So any fresh install should not get them, and any existing install
>>> should have them be removable or auto-removable with any moans.
>>>
>>> On 24/02/18 01:11, Matt Ruffalo wrote:
 Hi Rik-

 Thank you very much for the advice. I fully updated my system again,
 with no packages held back, rebooted, and was happy to try removing the
 two packages you mentioned.

 I was pleasantly surprised that I seem to have full performance with
 graphical effects, so apparently some package update in the last 12-ish
 hours has fixed this issue.

 I attempted to remove the two packages you mentioned, to give you better
 feedback, but I found that I don't have any package installed with the
 prefix "libglv" -- I'm typing "apt remove libglv" and tab-completion
 isn't suggesting any installed packages.

 I likewise do not have a package "libegl1" installed, but 'apt remove'
 tab completion suggested 'libegl1-mesa', and I'm guessing that removing
 this would have a lot of side effects:

 """
 root@isomorphic:~# apt remove libegl1-mesa
 Reading package lists... Done
 Building dependency tree  
 Reading state information... Done
 The following packages were automatically installed and are no longer
 required:
   chromium-codecs-ffmpeg-extra geoip-database-extra gir1.2-polkit-1.0
 gir1.2-secret-1
   kdegames-card-data-kf5 libaribb24-0 libbasicusageenvironment1 libcddb2
 libcfitsio5
   libdc1394-22 libdmtx0a libdvbpsi10 libebml4v5 libeditorconfig0
 libgee-0.8-2 libgit2-26
   libgps23 libgroupsock8 libhttp-parser2.7.1 libjavascriptcoregtk-4.0-18
 libjs-openlayers
   libkate1 libkf5akonadicalendar-data libkf5alarmcalendar-data
>>>

Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-03-02 Thread Rik Mills
The issue is things building in -proposed picking up a dependency on
libegl1 from libglvnd etc, but the version in -release is too old and
acceleration breaks when it migrates to -release. Ideally such things
should not migrate if they break things, but some oddities in this
mesa/libglvnd transition mean that is not being prevented.

Hopefully as soon as mesa and newer libglvnd migrate this will resolve
itself.

Don't have an ETA for that, but the ubuntu developers are aware and
working on it

Rik

On 02/03/18 16:36, Matt Ruffalo wrote:
> Hi Rik-
> 
> I updated my system last night, and found bad/choppy graphical
> performance again this morning. I don't know whether it's the same
> issue, but 'apt full-upgrade' would do the following, and I haven't yet
> had the chance to narrow anything down:
> 
> """
> root@isomorphic:~# apt full-upgrade
> Reading package lists... Done
> Building dependency tree  
> Reading state information... Done
> Calculating upgrade... Done
> The following NEW packages will be installed:
>   libegl1 libgdbm-compat4 libglvnd0
> The following packages have been kept back:
>   mp3splt
> The following packages will be upgraded:
>   debconf debconf-i18n default-jre default-jre-headless file
> fonts-mathjax java-common
>   language-pack-en libjavascriptcoregtk-4.0-18 libjs-mathjax
> libkf5contacts-data
>   libkf5contacts5 libkf5kdelibs4support-data libkf5kdelibs4support5
> libkf5kdelibs4support5-bin
>   libkf5plasma5 libkf5plasmaquick5 libmagic-mgc libmagic1 libmirclient9
> libmircommon7
>   libmircore1 libmirprotobuf3 libperl5.26 libseccomp2 libsnmp-base
> libsnmp30 libsort-key-perl
>   libtcl8.6 libwebkit2gtk-4.0-37 libwebkit2gtk-4.0-37-gtk2
> linux-firmware mlocate perl
>   perl-base perl-modules-5.26 plasma-framework python3-software-properties
>   python3-update-manager python3-xapian signal-desktop
> software-properties-common
>   software-properties-kde tcl8.6 ucf unattended-upgrades
> update-manager-core vim vim-common
>   vim-runtime vim-tiny xserver-common xserver-xorg-core
> xserver-xorg-legacy xxd
> 55 upgraded, 3 newly installed, 0 to remove and 1 not upgraded.
> """
> 
> When I have some time, I'll see which packages are pulling in 'libegl1'
> and 'libglvnd0'.
> 
> Thank you,
> MMR...
> 
> On 2018-02-24 02:50, Rik Mills wrote:
>> Yes, I uploaded a new version of kinfocenter which does not pull in the
>> 2 packages I mentioned, at least until we get newer versions that work
>> ok with the rest of our latest builds.
>>
>> So any fresh install should not get them, and any existing install
>> should have them be removable or auto-removable with any moans.
>>
>> On 24/02/18 01:11, Matt Ruffalo wrote:
>>> Hi Rik-
>>>
>>> Thank you very much for the advice. I fully updated my system again,
>>> with no packages held back, rebooted, and was happy to try removing the
>>> two packages you mentioned.
>>>
>>> I was pleasantly surprised that I seem to have full performance with
>>> graphical effects, so apparently some package update in the last 12-ish
>>> hours has fixed this issue.
>>>
>>> I attempted to remove the two packages you mentioned, to give you better
>>> feedback, but I found that I don't have any package installed with the
>>> prefix "libglv" -- I'm typing "apt remove libglv" and tab-completion
>>> isn't suggesting any installed packages.
>>>
>>> I likewise do not have a package "libegl1" installed, but 'apt remove'
>>> tab completion suggested 'libegl1-mesa', and I'm guessing that removing
>>> this would have a lot of side effects:
>>>
>>> """
>>> root@isomorphic:~# apt remove libegl1-mesa
>>> Reading package lists... Done
>>> Building dependency tree  
>>> Reading state information... Done
>>> The following packages were automatically installed and are no longer
>>> required:
>>>   chromium-codecs-ffmpeg-extra geoip-database-extra gir1.2-polkit-1.0
>>> gir1.2-secret-1
>>>   kdegames-card-data-kf5 libaribb24-0 libbasicusageenvironment1 libcddb2
>>> libcfitsio5
>>>   libdc1394-22 libdmtx0a libdvbpsi10 libebml4v5 libeditorconfig0
>>> libgee-0.8-2 libgit2-26
>>>   libgps23 libgroupsock8 libhttp-parser2.7.1 libjavascriptcoregtk-4.0-18
>>> libjs-openlayers
>>>   libkate1 libkf5akonadicalendar-data libkf5alarmcalendar-data
>>> libkf5calendarutils-data
>>>   libkf5cddb-data libkf5compactdisc-data libkf5contacteditor-data
>>> libkf5grantleetheme-data
>>>   libkf5gravatar-data libkf5identitymanagement-data libkf5imap-data
>>> libkf5jsapi5
>>>   libkf5kdegames-data libkf5ldap-data libkf5pimtextedit-data libkf5sane-data
>>>   libkf5syntaxhighlighting-data libkf5tnef-data liblivemedia62
>>> liblua5.2-0 libmatroska6v5
>>>   libmicrodns0 libmjpegutils-2.1-0 libnfs8 libokteta-data
>>> libokteta2core2 libopencore-amrnb0
>>>   libopencore-amrwb0 libopenmpt-modplug1 libpackagekitqt5-1 libplacebo3
>>> libproxy-tools
>>>   libqgpgme7 libqrencode3 libqt5sensors5 libqt5texttospeech5 libquicktime2
>>>   libresid-builder0c2a libsdl-image1.2 libsidplay2 libsmi2ldbl
>>> libsox-fmt-alsa libs

Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-03-02 Thread Matt Ruffalo
Hi Rik-

I updated my system last night, and found bad/choppy graphical
performance again this morning. I don't know whether it's the same
issue, but 'apt full-upgrade' would do the following, and I haven't yet
had the chance to narrow anything down:

"""
root@isomorphic:~# apt full-upgrade
Reading package lists... Done
Building dependency tree  
Reading state information... Done
Calculating upgrade... Done
The following NEW packages will be installed:
  libegl1 libgdbm-compat4 libglvnd0
The following packages have been kept back:
  mp3splt
The following packages will be upgraded:
  debconf debconf-i18n default-jre default-jre-headless file
fonts-mathjax java-common
  language-pack-en libjavascriptcoregtk-4.0-18 libjs-mathjax
libkf5contacts-data
  libkf5contacts5 libkf5kdelibs4support-data libkf5kdelibs4support5
libkf5kdelibs4support5-bin
  libkf5plasma5 libkf5plasmaquick5 libmagic-mgc libmagic1 libmirclient9
libmircommon7
  libmircore1 libmirprotobuf3 libperl5.26 libseccomp2 libsnmp-base
libsnmp30 libsort-key-perl
  libtcl8.6 libwebkit2gtk-4.0-37 libwebkit2gtk-4.0-37-gtk2
linux-firmware mlocate perl
  perl-base perl-modules-5.26 plasma-framework python3-software-properties
  python3-update-manager python3-xapian signal-desktop
software-properties-common
  software-properties-kde tcl8.6 ucf unattended-upgrades
update-manager-core vim vim-common
  vim-runtime vim-tiny xserver-common xserver-xorg-core
xserver-xorg-legacy xxd
55 upgraded, 3 newly installed, 0 to remove and 1 not upgraded.
"""

When I have some time, I'll see which packages are pulling in 'libegl1'
and 'libglvnd0'.

Thank you,
MMR...

On 2018-02-24 02:50, Rik Mills wrote:
> Yes, I uploaded a new version of kinfocenter which does not pull in the
> 2 packages I mentioned, at least until we get newer versions that work
> ok with the rest of our latest builds.
>
> So any fresh install should not get them, and any existing install
> should have them be removable or auto-removable with any moans.
>
> On 24/02/18 01:11, Matt Ruffalo wrote:
>> Hi Rik-
>>
>> Thank you very much for the advice. I fully updated my system again,
>> with no packages held back, rebooted, and was happy to try removing the
>> two packages you mentioned.
>>
>> I was pleasantly surprised that I seem to have full performance with
>> graphical effects, so apparently some package update in the last 12-ish
>> hours has fixed this issue.
>>
>> I attempted to remove the two packages you mentioned, to give you better
>> feedback, but I found that I don't have any package installed with the
>> prefix "libglv" -- I'm typing "apt remove libglv" and tab-completion
>> isn't suggesting any installed packages.
>>
>> I likewise do not have a package "libegl1" installed, but 'apt remove'
>> tab completion suggested 'libegl1-mesa', and I'm guessing that removing
>> this would have a lot of side effects:
>>
>> """
>> root@isomorphic:~# apt remove libegl1-mesa
>> Reading package lists... Done
>> Building dependency tree  
>> Reading state information... Done
>> The following packages were automatically installed and are no longer
>> required:
>>   chromium-codecs-ffmpeg-extra geoip-database-extra gir1.2-polkit-1.0
>> gir1.2-secret-1
>>   kdegames-card-data-kf5 libaribb24-0 libbasicusageenvironment1 libcddb2
>> libcfitsio5
>>   libdc1394-22 libdmtx0a libdvbpsi10 libebml4v5 libeditorconfig0
>> libgee-0.8-2 libgit2-26
>>   libgps23 libgroupsock8 libhttp-parser2.7.1 libjavascriptcoregtk-4.0-18
>> libjs-openlayers
>>   libkate1 libkf5akonadicalendar-data libkf5alarmcalendar-data
>> libkf5calendarutils-data
>>   libkf5cddb-data libkf5compactdisc-data libkf5contacteditor-data
>> libkf5grantleetheme-data
>>   libkf5gravatar-data libkf5identitymanagement-data libkf5imap-data
>> libkf5jsapi5
>>   libkf5kdegames-data libkf5ldap-data libkf5pimtextedit-data libkf5sane-data
>>   libkf5syntaxhighlighting-data libkf5tnef-data liblivemedia62
>> liblua5.2-0 libmatroska6v5
>>   libmicrodns0 libmjpegutils-2.1-0 libnfs8 libokteta-data
>> libokteta2core2 libopencore-amrnb0
>>   libopencore-amrwb0 libopenmpt-modplug1 libpackagekitqt5-1 libplacebo3
>> libproxy-tools
>>   libqgpgme7 libqrencode3 libqt5sensors5 libqt5texttospeech5 libquicktime2
>>   libresid-builder0c2a libsdl-image1.2 libsidplay2 libsmi2ldbl
>> libsox-fmt-alsa libsox-fmt-base
>>   libsox3 libspandsp2 libspectre1 libupnp6 libusageenvironment3
>> libva-wayland2 libvlc-bin
>>   libvlc5 libvlccore9 libvulkan1 libwireshark-data libwireshark10
>> libwiretap7 libwscodecs1
>>   libwsutil8 libxcb-xv0 libxfont2 pulseaudio-module-gconf sox transcode
>> transcode-doc twolame
>>   vlc-bin vlc-data vlc-l10n vlc-plugin-base vlc-plugin-samba
>> vlc-plugin-video-splitter
>>   vlc-plugin-visualization wireshark-common xserver-xorg-legacy
>> zenity-common
>> Use 'apt autoremove' to remove them.
>> The following additional packages will be installed:
>>   libportaudio2
>> The following packages will be REMOVED:
>>   amarok amarok-utils apport-kde apturl-kde ark balo

Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-02-24 Thread Dale Trombley
>
> Removing libegl1 libglvnd0 seems to get me go back to full hardware
> driven opengl, whereas with them it was llvmpipe only.


I can confirm that this fixed my graphics issue as well. thank you

>


On Sat, Feb 24, 2018 at 2:50 AM, Rik Mills  wrote:

> Yes, I uploaded a new version of kinfocenter which does not pull in the
> 2 packages I mentioned, at least until we get newer versions that work
> ok with the rest of our latest builds.
>
> So any fresh install should not get them, and any existing install
> should have them be removable or auto-removable with any moans.
>
> On 24/02/18 01:11, Matt Ruffalo wrote:
> > Hi Rik-
> >
> > Thank you very much for the advice. I fully updated my system again,
> > with no packages held back, rebooted, and was happy to try removing the
> > two packages you mentioned.
> >
> > I was pleasantly surprised that I seem to have full performance with
> > graphical effects, so apparently some package update in the last 12-ish
> > hours has fixed this issue.
> >
> > I attempted to remove the two packages you mentioned, to give you better
> > feedback, but I found that I don't have any package installed with the
> > prefix "libglv" -- I'm typing "apt remove libglv" and tab-completion
> > isn't suggesting any installed packages.
> >
> > I likewise do not have a package "libegl1" installed, but 'apt remove'
> > tab completion suggested 'libegl1-mesa', and I'm guessing that removing
> > this would have a lot of side effects:
> >
> > """
> > root@isomorphic:~# apt remove libegl1-mesa
> > Reading package lists... Done
> > Building dependency tree
> > Reading state information... Done
> > The following packages were automatically installed and are no longer
> > required:
> >   chromium-codecs-ffmpeg-extra geoip-database-extra gir1.2-polkit-1.0
> > gir1.2-secret-1
> >   kdegames-card-data-kf5 libaribb24-0 libbasicusageenvironment1 libcddb2
> > libcfitsio5
> >   libdc1394-22 libdmtx0a libdvbpsi10 libebml4v5 libeditorconfig0
> > libgee-0.8-2 libgit2-26
> >   libgps23 libgroupsock8 libhttp-parser2.7.1 libjavascriptcoregtk-4.0-18
> > libjs-openlayers
> >   libkate1 libkf5akonadicalendar-data libkf5alarmcalendar-data
> > libkf5calendarutils-data
> >   libkf5cddb-data libkf5compactdisc-data libkf5contacteditor-data
> > libkf5grantleetheme-data
> >   libkf5gravatar-data libkf5identitymanagement-data libkf5imap-data
> > libkf5jsapi5
> >   libkf5kdegames-data libkf5ldap-data libkf5pimtextedit-data
> libkf5sane-data
> >   libkf5syntaxhighlighting-data libkf5tnef-data liblivemedia62
> > liblua5.2-0 libmatroska6v5
> >   libmicrodns0 libmjpegutils-2.1-0 libnfs8 libokteta-data
> > libokteta2core2 libopencore-amrnb0
> >   libopencore-amrwb0 libopenmpt-modplug1 libpackagekitqt5-1 libplacebo3
> > libproxy-tools
> >   libqgpgme7 libqrencode3 libqt5sensors5 libqt5texttospeech5
> libquicktime2
> >   libresid-builder0c2a libsdl-image1.2 libsidplay2 libsmi2ldbl
> > libsox-fmt-alsa libsox-fmt-base
> >   libsox3 libspandsp2 libspectre1 libupnp6 libusageenvironment3
> > libva-wayland2 libvlc-bin
> >   libvlc5 libvlccore9 libvulkan1 libwireshark-data libwireshark10
> > libwiretap7 libwscodecs1
> >   libwsutil8 libxcb-xv0 libxfont2 pulseaudio-module-gconf sox transcode
> > transcode-doc twolame
> >   vlc-bin vlc-data vlc-l10n vlc-plugin-base vlc-plugin-samba
> > vlc-plugin-video-splitter
> >   vlc-plugin-visualization wireshark-common xserver-xorg-legacy
> > zenity-common
> > Use 'apt autoremove' to remove them.
> > The following additional packages will be installed:
> >   libportaudio2
> > The following packages will be REMOVED:
> >   amarok amarok-utils apport-kde apturl-kde ark baloo-kf5 bluedevil
> > breeze chromium-browser
> >   chromium-browser-l10n dolphin dolphin-plugins drkonqi ffmpeg
> > ffmpegthumbs firefox
> >   frameworkintegration gir1.2-gtk-3.0 gstreamer-qapt gwenview k3b
> k3b-i18n
> >   kaccounts-integration kaccounts-providers kactivitymanagerd kamera
> > kate kcalc kcharselect
> >   kde-baseapps-bin kde-cli-tools kde-config-gtk-style
> > kde-config-gtk-style-preview
> >   kde-config-mailtransport kde-config-screenlocker kde-config-sddm
> >   kde-config-telepathy-accounts kde-config-whoopsie kde-runtime
> > kde-spectacle kde-style-breeze
> >   kde-style-breeze-qt4 kde-style-oxygen-qt5 kde-style-qtcurve-qt5
> > kde-telepathy
> >   kde-telepathy-approver kde-telepathy-auth-handler
> > kde-telepathy-contact-list
> >   kde-telepathy-desktop-applets kde-telepathy-filetransfer-handler
> >   kde-telepathy-integration-module kde-telepathy-kaccounts
> > kde-telepathy-kpeople
> >   kde-telepathy-minimal kde-telepathy-send-file kde-telepathy-text-ui
> > kdeconnect
> >   kdeconnect-plasma kded5 kdegraphics-thumbnailers
> kdemultimedia-kio-plugins
> >   kdenetwork-filesharing kdesdk-dolphin-plugins kdesudo kgamma5
> > khelpcenter khotkeys kile
> >   kimageformat-plugins kinfocenter kinit kio kio-audiocd kio-extras
> > kio-ldap kio-sieve
> >   kio-smtp kmenuedit kmines konsole konsole-kpart konversation

Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-02-23 Thread Rik Mills
Yes, I uploaded a new version of kinfocenter which does not pull in the
2 packages I mentioned, at least until we get newer versions that work
ok with the rest of our latest builds.

So any fresh install should not get them, and any existing install
should have them be removable or auto-removable with any moans.

On 24/02/18 01:11, Matt Ruffalo wrote:
> Hi Rik-
> 
> Thank you very much for the advice. I fully updated my system again,
> with no packages held back, rebooted, and was happy to try removing the
> two packages you mentioned.
> 
> I was pleasantly surprised that I seem to have full performance with
> graphical effects, so apparently some package update in the last 12-ish
> hours has fixed this issue.
> 
> I attempted to remove the two packages you mentioned, to give you better
> feedback, but I found that I don't have any package installed with the
> prefix "libglv" -- I'm typing "apt remove libglv" and tab-completion
> isn't suggesting any installed packages.
> 
> I likewise do not have a package "libegl1" installed, but 'apt remove'
> tab completion suggested 'libegl1-mesa', and I'm guessing that removing
> this would have a lot of side effects:
> 
> """
> root@isomorphic:~# apt remove libegl1-mesa
> Reading package lists... Done
> Building dependency tree  
> Reading state information... Done
> The following packages were automatically installed and are no longer
> required:
>   chromium-codecs-ffmpeg-extra geoip-database-extra gir1.2-polkit-1.0
> gir1.2-secret-1
>   kdegames-card-data-kf5 libaribb24-0 libbasicusageenvironment1 libcddb2
> libcfitsio5
>   libdc1394-22 libdmtx0a libdvbpsi10 libebml4v5 libeditorconfig0
> libgee-0.8-2 libgit2-26
>   libgps23 libgroupsock8 libhttp-parser2.7.1 libjavascriptcoregtk-4.0-18
> libjs-openlayers
>   libkate1 libkf5akonadicalendar-data libkf5alarmcalendar-data
> libkf5calendarutils-data
>   libkf5cddb-data libkf5compactdisc-data libkf5contacteditor-data
> libkf5grantleetheme-data
>   libkf5gravatar-data libkf5identitymanagement-data libkf5imap-data
> libkf5jsapi5
>   libkf5kdegames-data libkf5ldap-data libkf5pimtextedit-data libkf5sane-data
>   libkf5syntaxhighlighting-data libkf5tnef-data liblivemedia62
> liblua5.2-0 libmatroska6v5
>   libmicrodns0 libmjpegutils-2.1-0 libnfs8 libokteta-data
> libokteta2core2 libopencore-amrnb0
>   libopencore-amrwb0 libopenmpt-modplug1 libpackagekitqt5-1 libplacebo3
> libproxy-tools
>   libqgpgme7 libqrencode3 libqt5sensors5 libqt5texttospeech5 libquicktime2
>   libresid-builder0c2a libsdl-image1.2 libsidplay2 libsmi2ldbl
> libsox-fmt-alsa libsox-fmt-base
>   libsox3 libspandsp2 libspectre1 libupnp6 libusageenvironment3
> libva-wayland2 libvlc-bin
>   libvlc5 libvlccore9 libvulkan1 libwireshark-data libwireshark10
> libwiretap7 libwscodecs1
>   libwsutil8 libxcb-xv0 libxfont2 pulseaudio-module-gconf sox transcode
> transcode-doc twolame
>   vlc-bin vlc-data vlc-l10n vlc-plugin-base vlc-plugin-samba
> vlc-plugin-video-splitter
>   vlc-plugin-visualization wireshark-common xserver-xorg-legacy
> zenity-common
> Use 'apt autoremove' to remove them.
> The following additional packages will be installed:
>   libportaudio2
> The following packages will be REMOVED:
>   amarok amarok-utils apport-kde apturl-kde ark baloo-kf5 bluedevil
> breeze chromium-browser
>   chromium-browser-l10n dolphin dolphin-plugins drkonqi ffmpeg
> ffmpegthumbs firefox
>   frameworkintegration gir1.2-gtk-3.0 gstreamer-qapt gwenview k3b k3b-i18n
>   kaccounts-integration kaccounts-providers kactivitymanagerd kamera
> kate kcalc kcharselect
>   kde-baseapps-bin kde-cli-tools kde-config-gtk-style
> kde-config-gtk-style-preview
>   kde-config-mailtransport kde-config-screenlocker kde-config-sddm
>   kde-config-telepathy-accounts kde-config-whoopsie kde-runtime
> kde-spectacle kde-style-breeze
>   kde-style-breeze-qt4 kde-style-oxygen-qt5 kde-style-qtcurve-qt5
> kde-telepathy
>   kde-telepathy-approver kde-telepathy-auth-handler
> kde-telepathy-contact-list
>   kde-telepathy-desktop-applets kde-telepathy-filetransfer-handler
>   kde-telepathy-integration-module kde-telepathy-kaccounts
> kde-telepathy-kpeople
>   kde-telepathy-minimal kde-telepathy-send-file kde-telepathy-text-ui
> kdeconnect
>   kdeconnect-plasma kded5 kdegraphics-thumbnailers kdemultimedia-kio-plugins
>   kdenetwork-filesharing kdesdk-dolphin-plugins kdesudo kgamma5
> khelpcenter khotkeys kile
>   kimageformat-plugins kinfocenter kinit kio kio-audiocd kio-extras
> kio-ldap kio-sieve
>   kio-smtp kmenuedit kmines konsole konsole-kpart konversation
> kpackagelauncherqml kpat krdc
>   kross kscreen ksshaskpass ksysguard ksystemlog ktexteditor-katepart
> ktnef ktorrent
>   kubuntu-driver-manager kubuntu-notification-helper kwalletmanager
> kwayland-integration kwin
>   kwin-addons kwin-common kwin-style-breeze kwin-x11 kwrited
> language-pack-kde-en
>   libavdevice57 libcolorcorrect5 libdbusmenu-qt5-2 libdebconf-kde1
> libegl1-mesa
>   libgrantlee-textdocument5 libgtk-3-0 libgtk-3-bin libk3

Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-02-23 Thread Matt Ruffalo
Hi Rik-

Thank you very much for the advice. I fully updated my system again,
with no packages held back, rebooted, and was happy to try removing the
two packages you mentioned.

I was pleasantly surprised that I seem to have full performance with
graphical effects, so apparently some package update in the last 12-ish
hours has fixed this issue.

I attempted to remove the two packages you mentioned, to give you better
feedback, but I found that I don't have any package installed with the
prefix "libglv" -- I'm typing "apt remove libglv" and tab-completion
isn't suggesting any installed packages.

I likewise do not have a package "libegl1" installed, but 'apt remove'
tab completion suggested 'libegl1-mesa', and I'm guessing that removing
this would have a lot of side effects:

"""
root@isomorphic:~# apt remove libegl1-mesa
Reading package lists... Done
Building dependency tree  
Reading state information... Done
The following packages were automatically installed and are no longer
required:
  chromium-codecs-ffmpeg-extra geoip-database-extra gir1.2-polkit-1.0
gir1.2-secret-1
  kdegames-card-data-kf5 libaribb24-0 libbasicusageenvironment1 libcddb2
libcfitsio5
  libdc1394-22 libdmtx0a libdvbpsi10 libebml4v5 libeditorconfig0
libgee-0.8-2 libgit2-26
  libgps23 libgroupsock8 libhttp-parser2.7.1 libjavascriptcoregtk-4.0-18
libjs-openlayers
  libkate1 libkf5akonadicalendar-data libkf5alarmcalendar-data
libkf5calendarutils-data
  libkf5cddb-data libkf5compactdisc-data libkf5contacteditor-data
libkf5grantleetheme-data
  libkf5gravatar-data libkf5identitymanagement-data libkf5imap-data
libkf5jsapi5
  libkf5kdegames-data libkf5ldap-data libkf5pimtextedit-data libkf5sane-data
  libkf5syntaxhighlighting-data libkf5tnef-data liblivemedia62
liblua5.2-0 libmatroska6v5
  libmicrodns0 libmjpegutils-2.1-0 libnfs8 libokteta-data
libokteta2core2 libopencore-amrnb0
  libopencore-amrwb0 libopenmpt-modplug1 libpackagekitqt5-1 libplacebo3
libproxy-tools
  libqgpgme7 libqrencode3 libqt5sensors5 libqt5texttospeech5 libquicktime2
  libresid-builder0c2a libsdl-image1.2 libsidplay2 libsmi2ldbl
libsox-fmt-alsa libsox-fmt-base
  libsox3 libspandsp2 libspectre1 libupnp6 libusageenvironment3
libva-wayland2 libvlc-bin
  libvlc5 libvlccore9 libvulkan1 libwireshark-data libwireshark10
libwiretap7 libwscodecs1
  libwsutil8 libxcb-xv0 libxfont2 pulseaudio-module-gconf sox transcode
transcode-doc twolame
  vlc-bin vlc-data vlc-l10n vlc-plugin-base vlc-plugin-samba
vlc-plugin-video-splitter
  vlc-plugin-visualization wireshark-common xserver-xorg-legacy
zenity-common
Use 'apt autoremove' to remove them.
The following additional packages will be installed:
  libportaudio2
The following packages will be REMOVED:
  amarok amarok-utils apport-kde apturl-kde ark baloo-kf5 bluedevil
breeze chromium-browser
  chromium-browser-l10n dolphin dolphin-plugins drkonqi ffmpeg
ffmpegthumbs firefox
  frameworkintegration gir1.2-gtk-3.0 gstreamer-qapt gwenview k3b k3b-i18n
  kaccounts-integration kaccounts-providers kactivitymanagerd kamera
kate kcalc kcharselect
  kde-baseapps-bin kde-cli-tools kde-config-gtk-style
kde-config-gtk-style-preview
  kde-config-mailtransport kde-config-screenlocker kde-config-sddm
  kde-config-telepathy-accounts kde-config-whoopsie kde-runtime
kde-spectacle kde-style-breeze
  kde-style-breeze-qt4 kde-style-oxygen-qt5 kde-style-qtcurve-qt5
kde-telepathy
  kde-telepathy-approver kde-telepathy-auth-handler
kde-telepathy-contact-list
  kde-telepathy-desktop-applets kde-telepathy-filetransfer-handler
  kde-telepathy-integration-module kde-telepathy-kaccounts
kde-telepathy-kpeople
  kde-telepathy-minimal kde-telepathy-send-file kde-telepathy-text-ui
kdeconnect
  kdeconnect-plasma kded5 kdegraphics-thumbnailers kdemultimedia-kio-plugins
  kdenetwork-filesharing kdesdk-dolphin-plugins kdesudo kgamma5
khelpcenter khotkeys kile
  kimageformat-plugins kinfocenter kinit kio kio-audiocd kio-extras
kio-ldap kio-sieve
  kio-smtp kmenuedit kmines konsole konsole-kpart konversation
kpackagelauncherqml kpat krdc
  kross kscreen ksshaskpass ksysguard ksystemlog ktexteditor-katepart
ktnef ktorrent
  kubuntu-driver-manager kubuntu-notification-helper kwalletmanager
kwayland-integration kwin
  kwin-addons kwin-common kwin-style-breeze kwin-x11 kwrited
language-pack-kde-en
  libavdevice57 libcolorcorrect5 libdbusmenu-qt5-2 libdebconf-kde1
libegl1-mesa
  libgrantlee-textdocument5 libgtk-3-0 libgtk-3-bin libk3b7
libk3b7-extracodecs libkaccounts1
  libkasten3controllers3 libkasten3core3 libkasten3gui3
libkasten3okteta1controllers1
  libkasten3okteta1core1 libkasten3okteta1gui1 libkdecorations2-5v5
libkdecorations2private5v5
  libkf5akonadiagentbase5 libkf5akonadicalendar5abi1
libkf5akonadicontact5abi1
  libkf5akonadicore-bin libkf5akonadicore5abi1 libkf5akonadimime5
libkf5akonadisearchdebug5
  libkf5akonadisearchpim5 libkf5akonadiwidgets5 libkf5alarmcalendar5
libkf5auth5 libkf5baloo5
  libkf5baloowidgets-bin libkf5baloowidgets-data libkf5baloowidgets5
libk

Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-02-23 Thread Rik Mills
Investigating on a Kabylake Intel with a live system.

Removing libegl1 libglvnd0 seems to get me go back to full hardware
driven opengl, whereas with them it was llvmpipe only.

Those are new packages being pulled in by kinfocentre building against
new things in -proposed pocket.

Can you confirm that removing them solves your issue?

On 23/02/18 16:55, Matt Ruffalo wrote:
> Update: it wasn't libdrm-intel1. I held back updates to that package,
> fully updated my system, rebooted, and get terrible graphical
> performance under OpenGL 2.0 and 3.1. Switching the rendering backend to
> XRender makes everything smooth again, though. Time to roll back my root
> filesystem again; figuring out which specific package(s) are causing
> this behavior seems like it's going to be a bit painful.
> 
> Today's daily Ubuntu (not Kubuntu) ISO didn't exhibit this problem.
> 
> MMR...
> 
> On 2018-02-23 10:08, Matt Ruffalo wrote:
>> Hi all-
>>
>> I'm looking through bugs on Launchpad but haven't seen anything
>> related to this yet, and I wanted to bring this to everyone's
>> attention ASAP.
>>
>> I'm running Kubuntu Bionic on my laptop: a 3rd-gen Thinkpad X1 Carbon,
>> and `lspci` tells me that my video hardware is a "VGA compatible
>> controller: Intel Corporation HD Graphics 5500 (rev 09)".
>>
>> After installing some updates on the 21st or 22nd, I found that my
>> Kubuntu installation had /terrible/ video performance: graphical
>> animations were choppy, there was noticeable stutter when moving
>> windows around the screen, and the "blur" effect was initially
>> disabled for the taskbar and application launcher menu. I use btrfs,
>> and my systems are configured to take snapshots of all available
>> subvolumes on every boot, so I could easily roll back my root
>> subvolume to the previous state -- I kept the subvolume for the "bad"
>> state so I could examine the apt log, though.
>>
>> One or more of these updates seems to have caused this (directly from
>> apt.log):
>>
>> """
>> Start-Date: 2018-02-20  19:52:00
>> Commandline: apt full-upgrade
>> Requested-By: mruffalo (1000)
>> Upgrade: libdrm-nouveau2:amd64 (2.4.89-1, 2.4.90-1),
>> libdrm-nouveau2:i386 (2.4.89-1, 2.4.90-1), libdrm-amdgpu1:amd64
>> (2.4.89-1, 2.4.90-1), libdrm-amdgpu1:i386 (2.4.89-1, 2.4.90-1),
>> libdrm2:amd64 (2.4.89-1, 2.4.90-1), libdrm2:i386 (2.4.89-1, 2.4.90-1),
>> libdrm-intel1:amd64 (2.4.89-1, 2.4.90-1), libdrm-intel1:i386
>> (2.4.89-1, 2.4.90-1), libdrm-radeon1:amd64 (2.4.89-1, 2.4.90-1),
>> libdrm-radeon1:i386 (2.4.89-1, 2.4.90-1), libdrm-common:amd64
>> (2.4.89-1, 2.4.90-1)
>> End-Date: 2018-02-20  19:52:12
>>
>> Start-Date: 2018-02-21  10:38:15
>> Commandline: apt full-upgrade
>> Requested-By: mruffalo (1000)
>> Install: libegl1:amd64 (0.2.999+git20170802-2, automatic),
>> libglvnd0:amd64 (0.2.999+git20170802-2, automatic)
>> Upgrade: milou:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
>> python3-distro-info:amd64 (0.17, 0.18), libkwinglutils11:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-workspace:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libtaskmanager6:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
>> libplasma-geolocation-interface5:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), liboxygenstyle5-5:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), libksignalplotter7:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), gtk3-engines-breeze:amd64 (5.12.1-0ubuntu1,
>> 5.12.2-0ubuntu1), libqt5test5:amd64 (5.9.3+dfsg-0ubuntu3,
>> 5.9.3+dfsg-0ubuntu4), libpowerdevilui5:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), kde-cli-tools:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), kde-config-gtk-style:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), bluedevil:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), qt5-gtk-platformtheme:amd64 (5.9.3+dfsg-0ubuntu3,
>> 5.9.3+dfsg-0ubuntu4), kde-config-gtk-style-preview:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), breeze-cursor-theme:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-nm:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-pa:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libpam-kwallet-common:amd64
>> (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
>> plasma-dataengines-addons:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), libprocesscore7:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), kwin-style-breeze:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), kwin-data:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), ksshaskpass:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), plasma-wallpapers-addons:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), libkf5sysguard-bin:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), systemsettings:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), plasma-discover-common:amd64 (5.12.1-0ubuntu2,
>> 5.12.2-0ubuntu1), kde-style-breeze:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), libqt5dbus5:amd64 (5.9.3+dfsg-0ubuntu3,
>> 5.9.3+dfsg-0ubuntu4), kmenuedit:amd64 (4:5.12.1-0ubuntu1,
>> 4:5.12.2-0ubuntu1), libqt5sql5-sqlite:amd64 (5.9.3+dfsg-0ubuntu3

Re: Kubuntu Bionic: graphical slowdown after installing recent updates

2018-02-23 Thread Matt Ruffalo

  
  
Update: it wasn't libdrm-intel1. I held back updates to that
package, fully updated my system, rebooted, and get terrible
graphical performance under OpenGL 2.0 and 3.1. Switching the
rendering backend to XRender makes everything smooth again, though.
Time to roll back my root filesystem again; figuring out which
specific package(s) are causing this behavior seems like it's going
to be a bit painful.

Today's daily Ubuntu (not Kubuntu) ISO didn't exhibit this problem.

MMR...

On 2018-02-23 10:08, Matt Ruffalo
  wrote:


  
  Hi all-
  
  I'm looking through bugs on Launchpad but haven't seen anything
  related to this yet, and I wanted to bring this to everyone's
  attention ASAP.
  
  I'm running Kubuntu Bionic on my laptop: a 3rd-gen Thinkpad X1
  Carbon, and `lspci` tells me that my video hardware is a "VGA
  compatible controller: Intel Corporation HD Graphics 5500 (rev
  09)".
  
  After installing some updates on the 21st or 22nd, I found that my
  Kubuntu installation had terrible video performance:
  graphical animations were choppy, there was noticeable stutter
  when moving windows around the screen, and the "blur" effect was
  initially disabled for the taskbar and application launcher menu.
  I use btrfs, and my systems are configured to take snapshots of
  all available subvolumes on every boot, so I could easily roll
  back my root subvolume to the previous state -- I kept the
  subvolume for the "bad" state so I could examine the apt log,
  though.
  
  One or more of these updates seems to have caused this (directly
  from apt.log):
  
  """
  Start-Date: 2018-02-20  19:52:00
  Commandline: apt full-upgrade
  Requested-By: mruffalo (1000)
  Upgrade: libdrm-nouveau2:amd64 (2.4.89-1, 2.4.90-1),
  libdrm-nouveau2:i386 (2.4.89-1, 2.4.90-1), libdrm-amdgpu1:amd64
  (2.4.89-1, 2.4.90-1), libdrm-amdgpu1:i386 (2.4.89-1, 2.4.90-1),
  libdrm2:amd64 (2.4.89-1, 2.4.90-1), libdrm2:i386 (2.4.89-1,
  2.4.90-1), libdrm-intel1:amd64 (2.4.89-1, 2.4.90-1),
  libdrm-intel1:i386 (2.4.89-1, 2.4.90-1), libdrm-radeon1:amd64
  (2.4.89-1, 2.4.90-1), libdrm-radeon1:i386 (2.4.89-1, 2.4.90-1),
  libdrm-common:amd64 (2.4.89-1, 2.4.90-1)
  End-Date: 2018-02-20  19:52:12
  
  Start-Date: 2018-02-21  10:38:15
  Commandline: apt full-upgrade
  Requested-By: mruffalo (1000)
  Install: libegl1:amd64 (0.2.999+git20170802-2, automatic),
  libglvnd0:amd64 (0.2.999+git20170802-2, automatic)
  Upgrade: milou:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
  python3-distro-info:amd64 (0.17, 0.18), libkwinglutils11:amd64
  (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-workspace:amd64
  (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libtaskmanager6:amd64
  (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
  libplasma-geolocation-interface5:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), liboxygenstyle5-5:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), libksignalplotter7:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), gtk3-engines-breeze:amd64 (5.12.1-0ubuntu1,
  5.12.2-0ubuntu1), libqt5test5:amd64 (5.9.3+dfsg-0ubuntu3,
  5.9.3+dfsg-0ubuntu4), libpowerdevilui5:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), kde-cli-tools:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), kde-config-gtk-style:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), bluedevil:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), qt5-gtk-platformtheme:amd64
  (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4),
  kde-config-gtk-style-preview:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), breeze-cursor-theme:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), plasma-nm:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), plasma-pa:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), libpam-kwallet-common:amd64
  (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
  plasma-dataengines-addons:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), libprocesscore7:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), kwin-style-breeze:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), kwin-data:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), ksshaskpass:amd64 (4:5.12.1-0ubuntu1,
  4:5.12.2-0ubuntu1), plasma-wallpapers-addons:amd64
  (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libkf5sysguard-bin:amd64
  (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), systemsettings:amd64
  (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
  plasma-discover-common:amd64 (5.12.1-0ubuntu2, 5.12.2-0ubuntu1),
  kde-style-breeze:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
  libqt5dbus5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4),
  kmenuedit:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
  libqt5sql5-sqlite:amd64 (5.9.3+dfsg-0ubuntu3,
  5.9.3+dfsg-0ubuntu4), khotkeys:amd64 (4:5.12.1-0ubuntu1

Kubuntu Bionic: graphical slowdown after installing recent updates

2018-02-23 Thread Matt Ruffalo

  
  
Hi all-

I'm looking through bugs on Launchpad but haven't seen anything
related to this yet, and I wanted to bring this to everyone's
attention ASAP.

I'm running Kubuntu Bionic on my laptop: a 3rd-gen Thinkpad X1
Carbon, and `lspci` tells me that my video hardware is a "VGA
compatible controller: Intel Corporation HD Graphics 5500 (rev 09)".

After installing some updates on the 21st or 22nd, I found that my
Kubuntu installation had terrible video performance:
graphical animations were choppy, there was noticeable stutter when
moving windows around the screen, and the "blur" effect was
initially disabled for the taskbar and application launcher menu. I
use btrfs, and my systems are configured to take snapshots of all
available subvolumes on every boot, so I could easily roll back my
root subvolume to the previous state -- I kept the subvolume for the
"bad" state so I could examine the apt log, though.

One or more of these updates seems to have caused this (directly
from apt.log):

"""
Start-Date: 2018-02-20  19:52:00
Commandline: apt full-upgrade
Requested-By: mruffalo (1000)
Upgrade: libdrm-nouveau2:amd64 (2.4.89-1, 2.4.90-1),
libdrm-nouveau2:i386 (2.4.89-1, 2.4.90-1), libdrm-amdgpu1:amd64
(2.4.89-1, 2.4.90-1), libdrm-amdgpu1:i386 (2.4.89-1, 2.4.90-1),
libdrm2:amd64 (2.4.89-1, 2.4.90-1), libdrm2:i386 (2.4.89-1,
2.4.90-1), libdrm-intel1:amd64 (2.4.89-1, 2.4.90-1),
libdrm-intel1:i386 (2.4.89-1, 2.4.90-1), libdrm-radeon1:amd64
(2.4.89-1, 2.4.90-1), libdrm-radeon1:i386 (2.4.89-1, 2.4.90-1),
libdrm-common:amd64 (2.4.89-1, 2.4.90-1)
End-Date: 2018-02-20  19:52:12

Start-Date: 2018-02-21  10:38:15
Commandline: apt full-upgrade
Requested-By: mruffalo (1000)
Install: libegl1:amd64 (0.2.999+git20170802-2, automatic),
libglvnd0:amd64 (0.2.999+git20170802-2, automatic)
Upgrade: milou:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
python3-distro-info:amd64 (0.17, 0.18), libkwinglutils11:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), plasma-workspace:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libtaskmanager6:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
libplasma-geolocation-interface5:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), liboxygenstyle5-5:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), libksignalplotter7:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), gtk3-engines-breeze:amd64 (5.12.1-0ubuntu1,
5.12.2-0ubuntu1), libqt5test5:amd64 (5.9.3+dfsg-0ubuntu3,
5.9.3+dfsg-0ubuntu4), libpowerdevilui5:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), kde-cli-tools:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), kde-config-gtk-style:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), bluedevil:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), qt5-gtk-platformtheme:amd64
(5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4),
kde-config-gtk-style-preview:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), breeze-cursor-theme:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), plasma-nm:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), plasma-pa:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), libpam-kwallet-common:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), plasma-dataengines-addons:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), libprocesscore7:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kwin-style-breeze:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), kwin-data:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1), ksshaskpass:amd64
(4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
plasma-wallpapers-addons:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), libkf5sysguard-bin:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), systemsettings:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), plasma-discover-common:amd64 (5.12.1-0ubuntu2,
5.12.2-0ubuntu1), kde-style-breeze:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), libqt5dbus5:amd64 (5.9.3+dfsg-0ubuntu3,
5.9.3+dfsg-0ubuntu4), kmenuedit:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), libqt5sql5-sqlite:amd64 (5.9.3+dfsg-0ubuntu3,
5.9.3+dfsg-0ubuntu4), khotkeys:amd64 (4:5.12.1-0ubuntu1,
4:5.12.2-0ubuntu1), plasma-discover:amd64 (5.12.1-0ubuntu2,
5.12.2-0ubuntu1), python-cairo:amd64 (1.15.4-2, 1.16.2-1),
libqt5widgets5:amd64 (5.9.3+dfsg-0ubuntu3, 5.9.3+dfsg-0ubuntu4),
breeze:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
kde-style-oxygen-qt5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
plasma-desktop:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
kactivitymanagerd:amd64 (5.12.1-0ubuntu1, 5.12.2-0ubuntu1),
libkdecorations2-5v5:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
initramfs-tools-bin:amd64 (0.130ubuntu2, 0.130ubuntu3),
user-manager:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
kde-style-breeze-qt4:amd64 (4:5.12.1-0ubuntu1, 4:5.12.2-0ubuntu1),
libkwineffects11:amd64 (4:5.12.1-0ubuntu1, 4:5.1