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[180.214.232.68]) by smtp.gmail.com with ESMTPSA id 18-20020a630012000000b0052c9d1533b6sm905392pga.56.2023.05.25.03.52.05 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 25 May 2023 03:52:08 -0700 (PDT) Message-ID: Date: Thu, 25 May 2023 17:52:02 +0700 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.11.0 Content-Language: en-US From: Bagas Sanjaya Subject: Fwd: 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: Linux Kernel Mailing List , Linux Regressions , Linux Framebuffer , DRI Development List , Linux Nouveau/NVIDIA , Linux Stable Cc: Daniel Vetter , Helge Deller , Antonino Daplas , Ben Skeggs , Karol Herbst , Lyude Paul , Felix Miata Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org 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 Thanks. -- An old man doll... just what I always wanted! - Clara