This is related to the issues at least on some devices for panel orientation quirks where added. My tests have been done over a Lenovo ideapad D330. This devices like the other ones that need panel orientation quirks, shows the initramfs with wrong stride and x and y swapped. By applying the panel orientation quirks this gets solved but many parts of the systems components needs to be patched. Hans has done a great job with plymouth, mutter... but always appears a new problem derived as for example vnc desktop sharing with this devices doesn't work and the output is send messed up. The strange thing is that bootloaders like GRUB or rEFInd seems to be able to handle this and they paint themselves right, despite when booting Windows directly Windows paints itself right and booted with GRUB or rEFInd the first second also paint itself wrong. Haven't tested this too much but the interesting thing is in the next paragraph. I decided to get the UEFI GOP video modes and found that the D330 have these ones: Mode 0: 1200x1920 Mode 1: 640x480 Mode 2: 800x600 Mode 3: 1024x768 Mode 4: 1920x1200 (this is the default one started by the firmware) Mode 5: 480x640 Mode 6: 600x800 Mode 7: 768x1024 So I thought that Linux is taking the first mode despite is not the active one and that's why the display is messed up. Playing a little I could modify the GOP video mode before booting with the UEFI Shell by simple using the mode 150 101. This causes GOP video mode 5 to be switched to video mode 0, the first one. Booting now makes initramfs messages to be correctly rendered but in the wrong orientation. A look at drivers/firmware/efi/libstub/gop.c seems to be what is happening, the first available video mode is used despite it could not be the active one in GOP and the active mode is not switched to the discovered one by Linux. Both GRUB and rEFInd are able to respect the video mode that GOP has active so it's possible to boot them landscape and portrait while being correctly rendered. I think the video mode should not be the first discovered one but the active one, or at least, the highest resolution video mode that respects the orientation. I still have to test what Windows do if I try to boot it with the video mode 0 active instead the default firmware mode 5, but I guess it just select the highest resolution available where the x > y, and I don't think this is the perfect approach, if some manufacturer wants to make a portrait booting device it only will be possible by respecting when the resolution is portrait or landscape while searching the highest of them. _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
