Public bug reported: ** Summary Screen is unreadable much of the time with black badly-tuned-digital-tv type fragments covering image. As you action things (use a menu, click on a different window etc) the black fragments move (though often only parts of screen; not all of screen)
** Background This was looked into because of a number of support requests and I detected a pattern. All users are using the HWE kernel, and issue didn't occur using 18.04.4, though I personally only tested the live daily (during the development cycle). - thinkpad x31 https://discourse.lubuntu.me/t/reviving-thinkpad-x31-problems-with-messed-up-screen/1457/ - thinkpad t42 https://ubuntuforums.org/showthread.php?t=2448800&p=13979514#post13979514 - thinkpad t41 https://askubuntu.com/questions/1266918/latest-updates-to-lubuntu-18-04-4-lts-32-bit-create-almost-impossible-graphics-i (and I believe others before I recognized the pattern & started noting; I ignored initially as I had no issues with t43, not having used the t42p or r50p in QA testing for awhile - a scan of my QA-testing live will show when I tested with each box in first line of comments). I've also seen this on very different boxes to old thinkpads too. My boxes impacted - ibm thinkpad t42p (pentium m, 2gb ram, amd/ati mobility firegl t2; rv350/m10 gl) - ibm thinkpad r50p (pentium m, 1gb ram, amd/ati mobility firegl t2; rv350/m10 gl) ** 20.04/HWE kernel only If I live QA-test using the 18.04.4 ISO or released image, no issues occur (using 5.3 kernel & it's packages). Likewise I have no issues using the GA (4.15) kernel in testing (the r50p was used more regularly in testing in prior bionic cycles, alas not much in 18.04.5 development/recently; expecting same results with thinkpad t43 which does not have this issue) This report should possibly be filed on xserver-xorg. I've only experienced it with old radeon thinkpads (but screen on box makes it difficult to explore) (Filed online as I've been struggling to file this on actual box) ** Affects: linux (Ubuntu) Importance: Undecided Status: Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1891790 Title: lubuntu 18.04.5 text unreadable on old thinkpads (radeon, HWE 5.4 kernel only) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1891790/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
