Asus Zenbook UX302

Question

This is meant as a general thread for arch users with a Asus Zenbook UX302LG laptop.
Sound (ALSA)
Put the following in /etc/modprobe.d/alsa.conf for example.
options snd_hda_intel enable=0,1
options snd slots=snd_hda_intel
options snd_hda_intel index=0
(Cheers, headkase. original thread)
Function keys
See the ASUS Zenbook Prime UX31A wiki page.
Short summary: For screen backligh you'll need the acpi_osi= kernel option, and it will 'just work', together with wireless toggle (F2) and screen on/off (F7). You'll need external module for keyboard backlight, as described in wiki.
Black screen on boot
Firstly, as motley pointed out to me here, if you're having problems with black screen on boot, install the linux-mainline kernel from AUR and things will probably be fine.
As a temporary solution with older kernels, like linux 3.12, you can use the i915.modeset=0 kernel option. You'll probably be able to start xserver, but not much else.
Also, the i915.i915_enable_rc6=1 kernel options will boost your battery life!
Resume from suspend
To fix the resume problems, you'll need to patch the mainline kernel (currently done successfully with rc7). Again, our dear motley has made things easy with a nice little script, to be found his repo here. (There you also have the patch kernel patch).
Last edited by 7SLEVIN (2014-03-24 08:37:25)

Answer 1

You fixed it!! Wow. You sir, are a boss.
Followed the exact steps you explained, without any problems.  Therefor, I renamed the thread to just UX302, as none has yet been specific to LG/LA variants.
For the record, here's my boot loader entry with Gummiboot:
title Arch Linux (motley)
linux /vmlinuz-mainline-motley
initrd /initramfs-mainline-motley.img
options root=PARTUUID=9785a2e5-ad84-496d-b254-aa710c3fe107 rw acpi_osi=
One question, though. I am getting som messy output from dmesg when being promped with Getty login prompt, right after boot:
[ 74.421789] ACPI: Waking up from system sleep state S3
[ 74.459908] xhci_hcd 0000:00:14.0: System wakeup disabled by ACPI
[ 74.526875] PM: noirq resume of devices complete after 92.873 msecs
[ 74.527299] PM: early resume of devices complete after 0.388 msecs
[ 74.527428] usb usb1: root hub lost power or was reset
[ 74.527432] usb usb2: root hub lost power or was reset
[ 74.527696] xhci_hcd 0000:00:14.0: irq 57 for MSI/MSI-X
[ 74.527828] mei_me 0000:00:16.0: irq 59 for MSI/MSI-X
[ 74.528017] nouveau [ DRM] re-enabling device...
[ 74.528037] nouveau [ DRM] resuming kernel object tree...
[ 74.528063] nouveau [ VBIOS][0000:04:00.0] running init tables
[ 74.530556] snd_hda_intel 0000:00:1b.0: irq 60 for MSI/MSI-X
[ 74.592785] nouveau E[ PIBUS][0000:04:00.0] GPC0: 0x4188ac 0x00000001 (0x1e70822e)
[ 74.689886] nouveau [ VOLT][0000:04:00.0] GPU voltage: 600000uv
[ 74.689888] nouveau [ PTHERM][0000:04:00.0] fan management: automatic
[ 74.689990] nouveau [ CLK][0000:04:00.0] --: core 405 MHz memory 810 MHz
[ 74.692680] nouveau [ DRM] resuming client object trees...
[ 74.694292] nouveau E[ PBUS][0000:04:00.0] MMIO read of 0x00000000 FAULT at 0x000260 [ TIMEOUT ]
[ 74.694646] nouveau E[ PBUS][0000:04:00.0] MMIO write of 0xbad0011f FAULT at 0x000260 [ TIMEOUT ]
[ 74.853547] ata1: SATA link up 6.0 Gbps (SStatus 133 SControl 300)
[ 74.873179] ata1.00: configured for UDMA/133
[ 74.873278] sd 0:0:0:0: [sda] Starting disk
[ 74.907058] usb 1-4: reset full-speed USB device number 2 using xhci_hcd
[ 75.080884] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88007fe0e6c0
[ 75.080887] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88007fe0e700
[ 75.080889] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88007fe0e740
[ 75.080891] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff880222297b00
[ 75.080893] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff880222297b40
[ 75.240667] usb 1-7: reset full-speed USB device number 4 using xhci_hcd
[ 75.415583] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88007fdfea80
[ 75.415587] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff88007fdfeac0
[ 75.415590] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8800c7e3d7c0
[ 75.574252] usb 1-5: reset high-speed USB device number 3 using xhci_hcd
[ 75.753977] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep ffff8802226755c0
[ 75.756790] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 75.757006] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 75.768934] PM: resume of devices complete after 1240.625 msecs
[ 75.770204] PM: Finishing wakeup.
[ 75.770207] Restarting tasks ... done.
[ 75.773023] video LNXVIDEO:00: Restoring backlight state
[ 75.773034] video LNXVIDEO:01: Restoring backlight state
[ 75.782763] Bluetooth: hci0: read Intel version: 370710018002030d00
[ 75.782781] Bluetooth: hci0: Intel Bluetooth firmware file: intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq
[ 75.891902] Bluetooth: hci0: Intel Bluetooth firmware patch completed and activated
[ 75.930445] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 75.930676] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 75.942526] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 76.404827] [drm] Enabling RC6 states: RC6 on, RC6p off, RC6pp off
[ 81.099201] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 81.099429] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 81.110282] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 81.422180] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20131218/nsarguments-95)
[ 81.422864] ACPI: \_SB_.PCI0.RP05.PEGP: failed to evaluate _DSM
[ 81.422880] ACPI Warning: \_SB_.PCI0.RP05.PEGP._DSM: Argument #4 type mismatch - Found [Buffer], ACPI requires [Package] (20131218/nsarguments-95)
[ 84.937079] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 84.937294] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 84.948839] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 84.966455] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 84.966678] iwlwifi 0000:03:00.0: L1 Disabled; Enabling L0S
[ 84.978287] IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready
[ 87.158495] wlan0: authenticate with f4:ec:38:c7:9e:f4
[ 87.160493] wlan0: send auth to f4:ec:38:c7:9e:f4 (try 1/3)
[ 87.162221] wlan0: authenticated
[ 87.163441] wlan0: associate with f4:ec:38:c7:9e:f4 (try 1/3)
[ 87.169872] wlan0: RX AssocResp from f4:ec:38:c7:9e:f4 (capab=0x431 status=0 aid=7)
[ 87.172947] wlan0: associated
[ 87.172973] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
Any idea what causing it? Anything significant I should worry about?
Again, thanks for sharing this with us! :-D