Obsoleted by kernel fix

[bdrung]

As your README.md explains, there is a bug in the firmware which breaks all pixel formats except the first one. I developed a quirk to fix the buggy firmware and submitted it to the upstream Linux: https://lore.kernel.org/lkml/20210325213458.51309-1-bdrung@posteo.de/

So once this patch is accepted, backported to older kernel released, and tribbled into the disto kernels this workaround script is not needed any more.

[AdamGleave]

Sweet, thanks for doing this! That is a much cleaner solution :) Let me know when it's accepted and I'll update the README to make it clear what kernel versions this script is not needed for.

[bdrung]

I'll do.

BTW, even with that firmware bug fixed, Firefox on Ubuntu does not support any of the pixel formats: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1906454

The workaround until Firefox supports it: Use Chromium. That works fine with the firmware fix.

[bdrung]

Since I have three computers that need this kernel patch, I started maintaining this patched linux kernel in my PPA for Ubuntu 20.10 (groovy): https://launchpad.net/~bdrung/+archive/ubuntu/ppa

I plan to maintain this linux kernel in the PPA until the patch is included in the latest Ubuntu release.

[LeoniePhiline]

@bdrung Thanks for your efforts! I hope these fixes get merged into the kernel as well as firefox soon. (Before the pandemic is over. :D)

Did you have a chance to report to upstream firefox? See https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1906454/comments/5

[ghost]

Is it in 5.12?

[bdrung]

Sadly not. I sent the patch four times, but got no response yet. You can follow the progress on https://lore.kernel.org/lkml/?q=Fix+pixel+format+change+for+Elgato+Cam+Link+4K

[bdrung]

Good news: The fix is now merged upstream and will be part of v5.14:

• fix commit: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4c6e0976295add7f0ed94d276c04a3d6f1ea8f83
• merge: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=31e798fd6f0ff0acdc49c1a358b581730936a09a

The fix is also currently included in Ubuntu: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1932367

[LeoniePhiline]

Fantastic! Thank you for your efforts!

[AdamGleave]

Nice, well done!

[bdrung]

So, the fix was backported to the stable releases. The fix is included in:

• 4.4.276
• 4.9.276
• 4.14.240
• 4.19.198
• 5.4.134
• 5.10.52
• 5.12.19
• 5.13.4
• 5.14-rc1

[LeoniePhiline]

Wow, big impact. Much better than expected!

[mcnaveen]

So, I can start using Camlink without any additional configuration? Like Plug and Play?