Ubuntu
nvidia-graphics-drivers-180 package

  1. Bug #95444
  2. Comment #129

Comment 129 for bug 95444

Revision history for this message
axx (axx) wrote : Re: No Screen Backlight Control; Sony Vaio with nvidia 8 series graphics

I may be wrong, but I have the feeling that the newest Nvidia drivers (177.80, which is only the latest ubuntu packaged version in fact) may have changed something and made your modifications ineffective. The fn+F5-6 don't work anymore, I have to enter the nvclock commands manually. (which is still usable of course)

The fn shortcuts now segfault, as seen in dmesg output:
nvclock[5526]: segfault at 0 ip b7dde2c3 sp bf9f4cfc error 4 in libc-2.8.90.so[b7d67000+158000]

The only other segfault I could find via google with error 4 in libc-2.8.90.so was also an nvidia driver bug report, so that's that.

I'll try removing your mods to see if it changes anything Shawe.

Also, it would be good if we could have someone in charge, be it of Nvidia integration or of acpi, to give us some heads up as to what to do to get this bugfix working and taken in consideration (and pardon my lack of knowledge concerning linux bug squishing).