[Nix-dev] Re: udev 151

[Yury G. Kudryashov]

Tony White wrote:

> On 13 April 2010 23:22, Yury G. Kudryashov
> <urkud+nix at ya.ru> wrote:
>> Hi!
>>
>> I'm working on udev upgrade. The only remaining problem is the new
>> firmware loader. They have rewritten firmware.sh in C, and it uses
>> hardcoded paths. I don't want to maintain non-trivial patch that will
>> never be accepted upstream, so I've asked the author if he will accept
>> looking also in getenv(FIRMWARE_DIRS).
>>
>> Another solution would be to replace hardcoded paths with
>> /var/run/udev/firmware, and symlink a symlink tree of firmware files
>> here. Are there any objections against this way?

> Hi Yury,
> How will this effect /root/test-firmware for say if I just wanted to
> chuck in some firmware to test, will that location no longer exist?
We can copy your /root/test-firmware into /nix/store. You'll need to nixos-
rebuild after each change in /root/test-firmware but you'll have rollbacks.

> I gather that maybe writing the firmware loader in C makes it run a
> bit faster than a shell script, is it noticeably any faster?
No idea.
> I don't think any one can object if you just make it work but upstream
> should IMO accept your request because the maintainer will hopefully
> understand that impure paths are generally bad when programming
> anything modular.
If I will not recieve an answer till Sunday, I'll use the second approach.

> I will need to be using the very latest kernel shortly in NixOS
> because of the i915 855gm bug in the i915 gpu driver which has only
> just last week (Possibly) Been fixed, so I am interested in following
> how this pans out.
You can use very latest kernel with current udev.
> 
> Thanks,
> Tony