Suspend my laptop disables the HDMI output

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Suspend my laptop disables the HDMI output

Post by pmario » Mon Dec 10, 2012 6:47 am

I have installed Mint 14 MATE 64Bit on my System76 Gazelle GazP7 as substitute of Ubuntu (which is default installed on this computer). Mint works quite well, the only component of the laptop that doesn't work out-of-the-box is the brightness controll, but it can be enabled by modifying /etc/default/grub.
So far, the only problem that I have is with the suspension: when I suspend my computer and then resume it, the computer loses the HDMI output of the graphic card. If I use xrandr to lists the outputs, HDMI isn't showed even if before the suspension it was enabled. The worst part is that even a reboot doesn't change this situation: no HDMI output and no errors in Xorg.0.log. The only way to fix this problem is to remove power source and the battery, wait some seconds and then power on the laptop again.
By the way, I didn't have this problem with Ubuntu and the System76 driver don't install anything about power management for my laptop (, under you can see that for gazp7 nothing is installed).

Code: Select all

> inxi -Fc0
System:    Kernel: 3.5.0-19-generic x86_64 (64 bit) Desktop: N/A Distro: Linux Mint 14 Nadia
Machine:   Mobo: System76 model: Gazelle Professional version: gazp7
           Bios: American Megatrends version: 4.6.5 date: 05/16/2012
CPU:       Quad core Intel Core i7-3610QM CPU (-HT-MCP-) cache: 6144 KB flags: (lm nx sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) 
           Clock Speeds: 1: 1200.00 MHz 2: 1200.00 MHz 3: 1200.00 MHz 4: 1200.00 MHz 5: 1200.00 MHz 6: 1200.00 MHz 7: 1200.00 MHz 8: 1200.00 MHz
Graphics:  Card: Intel 3rd Gen Core processor Graphics Controller 
           X.Org: 1.13.0 drivers: intel (unloaded: fbdev,vesa) Resolution: 1920x1080@60.0hz 
           GLX Renderer: Mesa DRI Intel Ivybridge Mobile GLX Version: 3.0 Mesa 9.0
Audio:     Card: Intel 7 Series/C210 Series Chipset Family High Definition Audio Controller driver: snd_hda_intel
           Sound: Advanced Linux Sound Architecture ver: 1.0.25
Network:   Card-1: Intel Centrino Advanced-N 6235 driver: iwlwifi 
           IF: wlan0 state: up mac: c4:85:08:0f:27:b5
           Card-2: Realtek RTL8111/8168B PCI Express Gigabit Ethernet controller driver: r8169 
           IF: eth0 state: down mac: 00:90:f5:cc:e0:b9
Drives:    HDD Total Size: 810.2GB (61.9% used) 1: id: /dev/sda model: INTEL_SSDSC2CW06 size: 60.0GB 
           2: id: /dev/sdb model: ST9750420AS size: 750.2GB 
Partition: ID: / size: 48G used: 36G (79%) fs: ext4 ID: swap-1 size: 7.90GB used: 0.00GB (0%) fs: swap 
RAID:      No RAID devices detected - /proc/mdstat and md_mod kernel raid module present
Sensors:   System Temperatures: cpu: 57.0C mobo: N/A 
           Fan Speeds (in rpm): cpu: N/A 
Info:      Processes: 180 Uptime: 47 min Memory: 1180.3/7881.2MB Client: Shell inxi: 1.8.4
This raises a side question to this thread: what is different at kernel and drivers level between Ubuntu and Mint?

Thank you for your help and your amazing distribution,

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Re: Suspend my laptop disables the HDMI output

Post by Therion87 » Fri Dec 28, 2012 2:20 pm

The difference is System76 supplies System76 drivers that fix issues like that under Ubuntu, there is nothing different about the kernels. There is a way to get the System76 drivers to work on Linux Mint, I saw them on a forum somewhere once.
Processor: i7-2860QM
Memory: 16 GB DDR3 @ 1600MHz
Graphics: Nvidia 560M 1.5GB - 313.18
Operating System: Linux Mint 13 Maya
HDD: 120 GB SSD & 500 GB HDD
Kernel: 3.9

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