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[Jerome <heninj@xxxxxxxxx>]

Here is the info for an Asus UX303LN.

** Attachment added: "ASUSTeK_COMPUTER_INC.-UX303LN.tar.gz"
   https://bugs.launchpad.net/ubuntu/+source/nvidia-graphics-drivers-331/+bug/1423033/+attachment/4334729/+files/ASUSTeK_COMPUTER_INC.-UX303LN.tar.gz

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https://bugs.launchpad.net/bugs/1423033

Title:
  nvidia.346 hybrid module error

Status in nvidia-graphics-drivers-331 package in Ubuntu:
  Confirmed

Bug description:
  laptop with hybrid hd4000+820m 
  Running optirun glxgears result in a really bad frame rate, about 50, worse than hd4000. 

  Dmesg report an error about nvidia module

    634.914023] WARNING: CPU: 3 PID: 2784 at /home/kernel/COD/linux/drivers/gpu/drm/drm_ioctl.c:143 drm_set_busid.isra.4+0xdf/0xf0 [drm]()
  [  634.914051] No drm_driver.set_busid() implementation provided by nv_drm_driver [nvidia]. Use drm_dev_set_unique() to set the unique name explicitly.
  [  634.914051] Modules linked in:
  [  634.914052]  nvidia(POE) bbswitch(OE) ctr ccm nvram msr nls_iso8859_1 arc4 intel_rapl iosf_mbi rtl8188ee uvcvideo x86_pkg_temp_thermal intel_powerclamp coretemp videobuf2_vmalloc videobuf2_memops videobuf2_core kvm v4l2_common snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic videodev snd_hda_intel media rtl_pci crct10dif_pclmul snd_hda_controller crc32_pclmul snd_hda_codec snd_hwdep rtlwifi snd_pcm mac80211 snd_seq_midi ghash_clmulni_intel snd_seq_midi_event aesni_intel aes_x86_64 hp_wmi snd_rawmidi sparse_keymap lrw cfg80211 gf128mul snd_seq snd_seq_device glue_helper rtsx_pci_ms memstick ablk_helper snd_timer cryptd snd joydev serio_raw snd_soc_sst_acpi soundcore mei_me spi_pxa2xx_platform mei soc_button_array i2c_hid shpchp hid dw_dmac dw_dmac_core i2c_designware_platform hp_wireless
  [  634.914076]  i2c_designware_core lpc_ich 8250_dw mac_hid parport_pc ppdev lp parport autofs4 mmc_block rtsx_pci_sdmmc i915 i2c_algo_bit psmouse ahci drm_kms_helper libahci drm r8169 rtsx_pci mii video sdhci_acpi sdhci wmi [last unloaded: nvidia]
  [  634.914086] CPU: 3 PID: 2784 Comm: Xorg Tainted: P        W  OE  3.19.0-999-generic #201502092105
  [  634.914087] Hardware name: Hewlett-Packard HP 15 Notebook PC/2212, BIOS F.24 09/26/2014
  [  634.914087]  000000000000008f ffff88025067fcd8 ffffffff817c4df0 0000000000000007
  [  634.914089]  ffff88025067fd28 ffff88025067fd18 ffffffff81076e87 ffff88023f36bd00
  [  634.914091]  ffff8802517d6840 ffff88022c517800 00000000ffffffea ffff88025067fe30
  [  634.914093] Call Trace:
  [  634.914096]  [<ffffffff817c4df0>] dump_stack+0x45/0x57
  [  634.914098]  [<ffffffff81076e87>] warn_slowpath_common+0x97/0xe0
  [  634.914100]  [<ffffffff81076f86>] warn_slowpath_fmt+0x46/0x50
  [  634.914109]  [<ffffffffc02de26f>] drm_set_busid.isra.4+0xdf/0xf0 [drm]
  [  634.914116]  [<ffffffffc02de2d2>] drm_setversion+0x52/0xc0 [drm]
  [  634.914124]  [<ffffffffc02ddde7>] drm_ioctl+0x257/0x590 [drm]
  [  634.914132]  [<ffffffffc02de280>] ? drm_set_busid.isra.4+0xf0/0xf0 [drm]
  [  634.914135]  [<ffffffff81207635>] do_vfs_ioctl+0x75/0x320
  [  634.914137]  [<ffffffff811f3a4a>] ? do_sys_open+0x1aa/0x220
  [  634.914139]  [<ffffffff81207971>] SyS_ioctl+0x91/0xb0
  [  634.914142]  [<ffffffff817d212d>] system_call_fastpath+0x16/0x1b
  [  634.914143] ---[ end trace 8c3c379e99e7616f ]---
  [  634.968612] vgaarb: this pci device is not a vga device
  [  651.829839] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20141107/nsarguments-95)
  [  651.833803] [drm] Module unloaded
  [  651.853456] bbswitch: disabling discrete graphics
  [  651.853470] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20141107/nsarguments-95)
  [  651.868090] pci 0000:09:00.0: Refused to change power state, currently in D0

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