Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 16 |
1 files changed, 11 insertions, 5 deletions
@@ -1,6 +1,8 @@ # Fedora KIWI image descriptions, modified to build & launch for Surface Pro 12" Gen 1 + + It is the fork of the original [KIWI image descriptions](https://forge.fedoraproject.org/releng/kiwi-descriptions), modified for launching Fedora Linux Rawhide Live ISO on Surface Pro 12" Gen 1 (and further installing it on the device). I bought this device as I viewed it as a great Linux GNOME tablet, but after several days, many hours of work of trying to do so, I must say that installing a distribution here (and then having it work fine) is a huge pain in the ass. @@ -24,18 +26,22 @@ To build this on Fedora Linux: []$ sudo dnf --assumeyes install kiwi kiwi-systemdeps distribution-gpg-keys # Run the image build []$ sudo ./kiwi-build --kiwi-file=Fedora.kiwi --image-type=<image_type> --image-profile=<image_profile> --output-dir ./outdir -# An example for Workstation Live CD ISO +# An example for Workstation Live CD ISO, takes around 16 minutes []$ sudo ./kiwi-build --kiwi-file=Fedora.kiwi --image-type=iso --image-profile=Workstation-Live --output-dir ./outdir ``` ## What is left out (for now) -* Live CD has to run in RAM, so `rd.live.ram=1` is set for cmdline. Otherwise, at least on my ancient flash drive, it fails to load multiple necessary services, including `polkit`. +* Live CD has to run in RAM, so `rd.live.ram=1` is set for cmdline. Otherwise, at least on my ancient flash drive, it fails to load multiple necessary services, including `polkit`. So, ~5 minutes of loading on USB 2 drive, while screen is not backlit, is to be expected. * No rescue vmlinuz. * No secure boot possible for this ISO for now, as the platform used is `efi` and not `uefi`. -* No GRUB auto hidden menu. Trying to have the menu hidden results in system leads to restart after trying to boot it. -* `wireupcameras.service` (which enables tablet's cameras to be used) fails on installed system (not in Live CD though), as no `/dev/media*` gets initialized. -* No hardware video decoding for now, as the iris video codec (`qcvss8380_pa.mbn`) is Windows-only (as far as I researched), but you can copy one to `/lib/firmware/qcom/x1p42100/Microsoft/Surface12/`, if you have Windows ARM64 partition. +* No GRUB auto hidden menu. Trying to have the menu hidden results in system restarting after trying to boot it. +* Hardware video encoding/decoding needs a firmware blob the image is not allowed to ship. The `qcom/vpu/vpu30_p1_s7.mbn` that `linux-firmware` provides is the same codec signed with Qualcomm's SecTools *test* key chain, which a retail Surface's TrustZone rejects -- `qcom_scm_pas_init_image()` fails and the kernel logs `qcom-iris aa00000.video-codec: error -22 initializing firmware`. The production-signed build exists only inside Microsoft's Surface driver package, which grants no redistribution right, so what ships here is the means and not the blob: + * If you kept the Windows ARM64 partition, `surface-video-firmware.service` finds it on the first boot after install and copies `qcvss8380_pa.mbn` out of its DriverStore. Nothing to do. + * If Windows is gone, download the [Surface Pro 12-inch driver pack](https://www.microsoft.com/en-us/download/details.aspx?id=108199) (~500 MB MSI) and run `sudo surface-video-firmware.sh -m /path/to/SurfacePro_12in_*.msi`. There is no automatic download: the Download Center hands out per-session links. + + The kernel's device tree already points `iris` at `/lib/firmware/qcom/x1p42100/Microsoft/Surface12/qcvss8380_pa.mbn`, so the driver picks it up as soon as it is there. +* Suspend on Snapdragon X is still very unstable. No deep sleep is available, so `mem_sleep_default=s2idle` was set. Even that leads to compromises as suspending via GNOME results in hard freeze, so the default power button behavior was changed to `interactive` and should not be changed back to `suspend`. ## Image variants |