Hi Jean, thank you for a quick reply. My hardware is HP Probook 6470b laptop, kernel 4.8.0-37-generic, lm-sensors version 1:3.4.0-3. I did # modprobe i2c-dev # i2cdetect -l and got this: i2c-3 i2c i915 gmbus dpc I2C adapter i2c-1 i2c i915 gmbus vga I2C adapter i2c-8 i2c DPDDC-D I2C adapter i2c-6 i2c DPDDC-B I2C adapter i2c-4 i2c i915 gmbus dpb I2C adapter i2c-2 i2c i915 gmbus panel I2C adapter i2c-0 i2c i915 gmbus ssc I2C adapter i2c-7 i2c DPDDC-C I2C adapter i2c-5 i2c i915 gmbus dpd I2C adapter I would like to find out CAS latency times of my RAM memory modules without opening the laptop. I guess those are on DIMM slots. dmidecode -t memory gives: Handle 0x0008, DMI type 17, 34 bytes Memory Device Array Handle: 0x0005 Error Information Handle: Not Provided Total Width: 64 bits Data Width: 64 bits Size: 4096 MB Form Factor: SODIMM Set: None Locator: Bottom-Slot 2(under) Bank Locator: BANK 2 Type: DDR3 Type Detail: Synchronous Speed: 1600 MHz Manufacturer: Ramaxel Serial Number: 44BBE80E Asset Tag: 9876543210 Part Number: RMT3160ED58E9W1600 Rank: Unknown Configured Clock Speed: Unknown and lspci: 00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) 00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04) 00:19.0 Ethernet controller: Intel Corporation 82579V Gigabit Network Connection (rev 04) 00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4) 00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4) 00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4) 00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4 (rev c4) 00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation HM76 Express Chipset LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) 23:00.0 FireWire (IEEE 1394): JMicron Technology Corp. IEEE 1394 Host Controller (rev 30) 23:00.1 System peripheral: JMicron Technology Corp. SD/MMC Host Controller (rev 30) 23:00.2 SD Host controller: JMicron Technology Corp. Standard SD Host Controller (rev 30) 24:00.0 Network controller: Broadcom Limited BCM43228 802.11a/b/g/n I know I could find out latency times on the manufacturer's web page, but I would like to know is it possible via i2c? I'm noob in Linux and bad at english, sorry for my mistakes and thanks for your help in advance. BR Hrvoje *trying without html from gmail one more time -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html