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Kernel: CPU Undervolting, Nvidia Problems and Embedded Linux Conference Europe

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Linux
  • Linux Developers Discussing Possible Kernel Driver For Intel CPU Undervolting

    While the Intel Extreme Tuning Utility (XTU) on Windows allows for undervolting laptop processors, currently on Linux there isn't any Intel-endorsed way for undervolting your CPU should you be interested in better thermal/power efficiency and other factors. But a hypothetical Linux kernel driver could be coming for filling such void.

    There does exist the intel-undervolt program that is unofficial and developed by an independent developer for undervolting Intel CPUs from Haswell and newer on Linux. Besides dropping the CPU voltage, it also allows manipulating the throttling power/thermal limits for Intel processors. That intel-undervolt functionality relies on reverse-engineering and discoveries made by the community for the support. That program in turn is touching the CPU MSRs directly for manipulating the behavior.

  • The Closed-Source NVIDIA Linux Driver Is Incompatible With Linux 5.9 And Support Won't Come Until Mid-November

    The latest Nvidia graphics driver for Linux, v455.28, won't work with the latest Linux kernel. This may be due to an intentional change on the Linux kernel side that blocks third party shims from using GPL-only symbols. Regardless of the root cause, anyone using Nvidia on Linux should stick with Linux 5.8 for now. Nvidia has promised that an updated driver compatible with Linux 5.9 will arrive mid-November.

    [...]

    Using the closed-source proprietary software driver from Nvidia used to be a total nightmare on Linux. It would only work with Xorg version X and kernel version Y and if you were screwed if you upgraded either of those. That's been less of a problem in recent years. now we're once again back to Nvidia's driver dictating what kernel versions those who own their hardware can and can't use.

  • Live Embedded Event: a new online conference - Bootlin's blog

    In these times of COVID19, pretty much all of the existing conferences have moved to an online format. For example, the Embedded Linux Conference Europe is going to take place next week, online, and Bootlin will significantly contribute to the event with no less than 7 talks on a wide range of topics.

    But this trend for online conferences has also spurred the creation of new events. And specifically, we’re happy to announce the creation of a new conference oriented towards our favorite topic of embedded systems: Live Embedded Event. It will take place online on December 3 and will have a broader range of topics covered than ELC typically has, as Live Embedded Event is open to non-Linux embedded topics, hardware platform and interfaces discussions, and more.

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Linux 5.10-rc6

For the first part of the week, it really looked like things were
calming down quite nicely, and I mentally already went "Ahh,
Thanksgiving week, this is going to be a nice small, calm rc".

And then Friday rolled around, and everybody sent me their pull
requests for the week, and it all looks very normal again.

But at least this week isn't unusually bigger than normal - it's a
pretty normal rc6 stat-wise.  So unless we have some big surprising
left-overs coming up, I think we're in good shape.

And the diffstat looks nice and flat too,  which is a sign of just
widespread small fixes, rather than some big last-minute changes. The
exception is a chunk of fixes to the new vidtv driver, but that is not
only a new driver, it's a virtual test-driver for validation and
development rather than something that would affect users.

That vidtv driver shows up very clearly in the patch stats too, but
other than that it all looks very normal: mostly driver updates (even
ignoring the vidtv ones), with the usual smattering of small fixes
elsewhere - architecture code, networking, some filesystem stuff.

So I'm feeling pretty good about 5.10, and I hope I won't be proven
wrong about that. But please do test,

                 Linus

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