On 5/25/23 17:52, Bagas Sanjaya wrote: > Hi, > > I notice a regression report on Bugzilla [1]. Quoting from it: > >> Original Summary: >> absent both plymouth, and video= on linu lines, vtty[1-6] framebuffers produce vast raster right and bottom borders on the larger resolution of two displays >> >> To reproduce: >> 1-connect two unequal native resolution displays to a Tesla or Firmi GPU >> 2-don't have plymouth in use (I don't ever have it installed, so don't know whether it impacts) >> 3-don't include e.g. video=1440x900@60 directive on Grub's linu lines >> 4-boot Tumbleweed or Fedora 38 >> 5-switch to a vtty, e.g. Ctrl-Alt-F3 >> >> Actual behavior: >> 1-Both displays utilize the resolution (same pixel grid) of the lower resolution display >> 2-Lower resolution display behaves as expected (light text on black background) >> 3-Higher resolution display uses same pixels as lower resolution display, with light text on black background, leaving right side and bottom raster instead of black >> >> Expected behavior: >> 1-Both displays utilize the resolution (same pixel grid) of the lower resolution display >> 2-Lower resolution display behaves as expected >> 3-Entire higher resolution display's background is black instead of portions in raster >> >> Workaround: add e.g. video=1440x900@60 to Grub's linu lines, which causes both displays to use the same nominal mode on the full display space. >> >> Typical other linu line options: >> noresume consoleblank=0 net.ifnames=0 ipv6.disable=1 preempt=full mitigations=none >> >> My Tesla has HDMI and DVI outputs, tested with 1920x1200 and 1680x1050 displays. >> My Fermi has dual DisplayPort, tested with 2560x1440 and 1680x1050 displays. >> Occurs Tumbleweed with 6.3.2 and 6.2.12 kernel-default, and with 6.2.15 on Fedora 38, and (partially with Tesla, right side only) with 6.2.12 and 6.3.3 on Mageia 9. >> Does not occur with 6.1.12 kernel-default on NVidia, or with AMD Caicos (Terascale2) GPU, or with Intel Eaglelake GPU. >> Tested only on legacy booting (no UEFI support). >> Others might describe what I call "raster" as multicolored snow. > > See bugzilla for the full thread and attached dmesg. > > Anyway, I'm adding it to regzbot: > > #regzbot introduced: v6.1.12..v6.2.12 > #regzbot title: vast raster right and bottom borders on larger display (two displays with inequal resolution) unless forcing resolution with video= parameter > Oops, I forget to add bugzilla link: #regzbot introduced: v6.1.12..v6.2.12 https://bugzilla.kernel.org/show_bug.cgi?id=217479 #regzbot from: Felix Miata <mrmazda@xxxxxxxxxxxxx> Thanks. -- An old man doll... just what I always wanted! - Clara
