Hi list, I was wondering if anyone had instructions on how to update to kernel 3.19 or above. I have spent ~an hour googling, but all I can find are tutorials for ubuntu, most of which do it through apt. I checked jessie-backports but 3.16 seems to be the latest available outside of unstable. The reason I want to upgrade is I seem to be affected by a bug[1] that causes bumblebee to not be able to switch on my discrete graphics card, and said issue was reportedly fixed in kernel 3.19[2] Or if someone knows how to fix this without upgrading that would be even more appreciated. My issue is that bumblebee can't enable my discrete graphics card. I have a GT 745m 01:00.0 3D controller: NVIDIA Corporation GK107M [GeForce GT 745M] (rev ff) my onboard: 00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06) whenever I try to `optirun` anything I get --- $ optirun glxgears [37224.064111] [ERROR]Cannot access secondary GPU - error: Could not enable discrete graphics card [37224.064129] [ERROR]Aborting because fallback start is disabled. --- and bumblebee logs: --- [37207.802462] [INFO]bumblebeed 3.2.1 started [37207.802516] [INFO]Initialization completed - now handling client requests [37224.051468] [DEBUG]Accepted new connection [37224.051559] [INFO]Switching dedicated card ON [bbswitch] [37224.064087] [ERROR]Could not enable discrete graphics card [37224.064145] [DEBUG]Socket closed. --- and dmesg: --- [37254.827782] bbswitch: enabling discrete graphics [37254.840269] pci 0000:01:00.0: Refused to change power state, currently in D3 --- [1]: https://github.com/Bumblebee-Project/Bumblebee/issues/615 [2]:https://github.com/Bumblebee-Project/Bumblebee/issues/615#issuecomment-91174982
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