On Friday 27 January 2017 17:23:07 Kalle Valo wrote: > Pali Rohár <pali.rohar@xxxxxxxxx> writes: > > > On Friday 27 January 2017 14:26:22 Kalle Valo wrote: > >> Pali Rohár <pali.rohar@xxxxxxxxx> writes: > >> > >> > 2) It was already tested that example NVS data can be used for N900 e.g. > >> > for SSH connection. If real correct data are not available it is better > >> > to use at least those example (and probably log warning message) so user > >> > can connect via SSH and start investigating where is problem. > >> > >> I disagree. Allowing default calibration data to be used can be > >> unnoticed by user and left her wondering why wifi works so badly. > > > > So there are only two options: > > > > 1) Disallow it and so these users will have non-working wifi. > > > > 2) Allow those data to be used as fallback mechanism. > > > > And personally I'm against 1) because it will break wifi support for > > *all* Nokia N900 devices right now. > > All two of them? :) Ehm... > But not working is exactly my point, if correct calibration data is not > available wifi should not work. And it's not only about functionality > problems, there's also the regulatory aspect. About functionality, Pavel confirmed too that SSH is somehow working... Regulatory aspect is different, but via iw can be manually configured some settings. > >> > 3) If we do rename *now* we will totally break wifi support on Nokia > >> > N900. > >> > >> Then the distro should fix that when updating the linux-firmware > >> packages. Can you provide details about the setup, what distro etc? > > > > Debian stable, Ubuntu LTSs 14.04, 16.04. > > You can run these out of box on N900? Out-of-box I can run Kubuntu 12.04 (which is LTS too). They had prepared special image for N900 and I still have it on uSD card. I guess that new versions of Ubuntu could somehow work (maybe not out-of-box but with some changes) and Pavel has working Debian. Also basic support needed for wifi and SSH server is probably working with any distribution targeting armv7-a or omap3. So yes, I can say it is out-of-box. We will not have GSM calls or camera support, but wifi breakage is there. > > And I think that other LTS distributions contains that example nvs > > file too (I'm not going to verify others, but list will be probably > > long). Upgrading linux-firmware is against policy of those > > distributions. So no this is not an solution. > > So instead we should workaround distro policies in kernel? Come on. > > Seriously, just rename the file in linux-firmware and file a bug (with a > patch) to distros. If they don't fix the bug you just have to do a > custom hack for N900. But such is life. I do not see point what will be changed. I rename that file and after system update (or integrity check) it will be there again. And if I do that, what prevents kernel to stop using NVS file from /lib/firmware/? Nothing, original problem (which is going solved by this patch series) still remains. -- Pali Rohár pali.rohar@xxxxxxxxx
