Arch Linux

mityukov

Member

Registered: 2010-10-10

Posts: 66

Samsung NP305V5A: Screen does not come back after resume

The issue: screen does not turn ON when resuming from suspend-to-ram. PC fans start working. I can even "gently" reboot the notebook, by pressing <Ctrl>+<Alt>+<F1>, then <Ctrl>+<Alt>+<Del>. But the screen does not work..

Note: resume worked with the Catalyst driver (but this blob has many other glitches...)

$ lspci | grep VGA
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] BeaverCreek [Radeon HD 6520G]
02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Seymour [Radeon HD 6400M/7400M Series]

Video driver: radeon

Kernel parameters: root=/dev/sda2 rw radeon.dpm=1
(note: radeon.dpm=1 helps a lot; before kernel v3.11 I could not use radeon at all)

/etc/X11/xorg.conf.d/20-radeon.conf

Section "Device"
    Identifier  "Radeon"
    Driver      "radeon"
    Option      "ZaphodHeads"   "VGA-0"
    Option      "ColorTiling2D" "false"
EndSection

(
not sure if the following is usable, but still:

$ lsmod | grep video
uvcvideo               72900  0 
videobuf2_vmalloc       3280  1 uvcvideo
videobuf2_memops        2343  1 videobuf2_vmalloc
videobuf2_core         28027  1 uvcvideo
videodev              111140  2 uvcvideo,videobuf2_core
media                  11751  2 uvcvideo,videodev
i2c_core               24164  6 drm,i2c_piix4,drm_kms_helper,i2c_algo_bit,radeon,videodev
video                  11196  1 samsung_laptop
usbcore               179880  6 uvcvideo,ohci_hcd,ohci_pci,ehci_hcd,ehci_pci,usbhid

)