> And it took almost two weeks for you to notice this after the upgrade?
No. I noticed it immediately. However, since most of the time fixes come within a few days, I did not report the bug at the time, thinking I wasn't the only one with that desktop behavior. > note that there were no changes to the radeon code in the libdrm update, so > blaming > the regression on it is weird, I'd suggest to look at KDE instead I'm not "blaming" libdrm in a criticizing way :) It's just that it was the ONLY updated package at that time that could have caused the bug to appear since I doubt libreoffice could be the one that has an impact (see the previous attachment with the upgraded packages that day)... As a developper myself (bare-metal, kernel, CLI, QT) for the industry, I'm fully aware that there can be bugs at several levels. > You still have the old libdrm available in the archive btw, does downgrade do > anything? No in mine, I'm afraid. I tried to do that but apt do not want me to. When I simulate the downgrade here is what it gives: $ cat libdrm2-packages-versions libdrm-nouveau2=2.4.95-1~18.04.1 libdrm-amdgpu1=2.4.95-1~18.04.1 libdrm2=2.4.95-1~18.04.1 libdrm-intel1=2.4.95-1~18.04.1 libdrm-radeon1=2.4.95-1~18.04.1 libdrm-common=2.4.95-1~18.04.1 $ sudo apt-get -s install $(cat libdrm2-packages-versions) Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: gnuplot : Depends: gnuplot-qt but it is not going to be installed or gnuplot-x11 but it is not going to be installed or gnuplot-nox E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages. Trying to upgrade them 1 by 1 gives the results found in this post attached file. I did not go further in downgrading in the fear of having inconsistencies between packages versions. ** Attachment added: "apt-upgrade-libdrm2" https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/1829872/+attachment/5269255/+files/apt-upgrade-libdrm2 -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to libdrm in Ubuntu. https://bugs.launchpad.net/bugs/1829872 Title: No more desktop effects since libdrm upgrade in Bionic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libdrm/+bug/1829872/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp