Samsung C34H890 ultrawide resolution missing


I have a new external monitor which runs a 3440x1440 resolution at 100 Hz. In the display set up my laptop display is shown correctly and the Samsung recognized, but the settings do not allow for any 21:9 screen and the may Hertz are 60, even though the laptop monitor runs at 120 Hz.

I tried to update the driver but it did not find any update. All posts I found refer to nvidia driver set-up, not Skylake.

This is my system set-up:

Kernel: 5.4.80-2-MANJARO x86_64 bits: 64 compiler: gcc v: 10.2.0

parameters: BOOT_IMAGE=/boot/vmlinuz-5.4-x86_64

root=UUID=ede1710f-c274-41ca-9c6b-7dd5e7e3e9f6 rw quiet apparmor=1

security=apparmor udev.log_priority=3

Desktop: KDE Plasma 5.20.4 tk: Qt 5.15.2 wm: kwin_x11 dm: SDDM

Distro: Manjaro Linux


Type: Laptop System: Purism product: Librem 15 v3 v: 3.0 serial:

Chassis: type: 9 serial:

Mobo: Purism model: Librem 15 v3 v: 3.0 serial: BIOS: coreboot

v: 4.9-Purism-1 date: 05/16/2019


ID-1: BAT charge: 49.9 Wh condition: 50.6/48.8 Wh (104%) volts: 12.6/11.1

model: TPS S10 type: Li-ion serial: N/A status: Charging


Info: Dual Core model: Intel Core i7-6500U bits: 64 type: MT MCP

arch: Skylake family: 6 model-id: 4E (78) stepping: 3 microcode: E2

L2 cache: 4096 KiB

flags: avx avx2 lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx

bogomips: 20810

Speed: 800 MHz min/max: 400/3100 MHz Core speeds (MHz): 1: 800 2: 800 3: 800

4: 802

Vulnerabilities: Type: itlb_multihit status: KVM: Split huge pages

Type: l1tf

mitigation: PTE Inversion; VMX: conditional cache flushes, SMT vulnerable

Type: mds mitigation: Clear CPU buffers; SMT vulnerable

Type: meltdown mitigation: PTI

Type: spec_store_bypass

mitigation: Speculative Store Bypass disabled via prctl and seccomp

Type: spectre_v1

mitigation: usercopy/swapgs barriers and __user pointer sanitization

Type: spectre_v2 mitigation: Full generic retpoline, IBPB: conditional,

IBRS_FW, STIBP: conditional, RSB filling

Type: srbds mitigation: Microcode

Type: tsx_async_abort status: Not affected


Device-1: Intel Skylake GT2 [HD Graphics 520] driver: i915 v: kernel

bus ID: 00:02.0 chip ID: 8086:1916

Device-2: Alcor Micro HD WebCam type: USB driver: uvcvideo bus ID: 1-7:3

chip ID: 058f:d102

Display: x11 server: X…Org 1.20.10 compositor: kwin_x11 driver: modesetting

unloaded: intel alternate: fbdev,vesa display ID: :0 screens: 1

Screen-1: 0 s-res: 1920x1080 s-dpi: 96 s-size: 506x285mm (19.9x11.2")

s-diag: 581mm (22.9")

Monitor-1: eDP-1 res: 1920x1080 dpi: 142 size: 344x194mm (13.5x7.6")

diag: 395mm (15.5")

Monitor-2: HDMI-1 res: 1920x1080 hz: 60 dpi: 61 size: 797x333mm (31.4x13.1")

diag: 864mm (34")

OpenGL: renderer: Mesa Intel HD Graphics 520 (SKL GT2) v: 4.6 Mesa 20.2.3

direct render: Yes


Device-1: Intel Sunrise Point-LP HD Audio driver: snd_hda_intel v: kernel

alternate: snd_soc_skl bus ID: 00:1f.3 chip ID: 8086:9d70

Sound Server: ALSA v: k5.4.80-2-MANJARO


Device-1: Qualcomm Atheros AR9462 Wireless Network Adapter vendor: Lite-On

driver: ath9k v: kernel port: efa0 bus ID: 01:00.0 chip ID: 168c:0034

IF: wlp1s0 state: up mac:

Device-2: Lite-On Atheros AR3012 Bluetooth type: USB driver: btusb

bus ID: 1-6:2 chip ID: 04ca:300d


Local Storage: total: 1.14 TiB used: 285.45 GiB (24.5%)

SMART Message: Required tool smartctl not installed. Check --recommends

ID-1: /dev/nvme0n1 vendor: Samsung model: SSD 970 EVO Plus 1TB

size: 931.51 GiB block size: physical: 512 B logical: 512 B speed: 31.6 Gb/s

lanes: 4 serial: rev: 1B2QEXM7 scheme: MBR

ID-2: /dev/sda vendor: Samsung model: SSD 860 EVO 250GB size: 232.89 GiB

block size: physical: 512 B logical: 512 B speed: 3.0 Gb/s serial:

rev: 3B6Q scheme: GPT


ID-1: / raw size: 931.51 GiB size: 915.89 GiB (98.32%)

used: 118.70 GiB (13.0%) fs: ext4 dev: /dev/nvme0n1p1


Alert: No Swap data was found.


System Temperatures: cpu: 32.0 C mobo: N/A

Fan Speeds (RPM): N/A


Processes: 169 Uptime: 38m Memory: 31.28 GiB used: 1.68 GiB (5.4%)

Init: systemd v: 246 Compilers: gcc: 10.2.0 alt: 8/9 clang: 11.0.0 Packages:

pacman: 1604 lib: 420 flatpak: 0 Shell: Bash v: 5.0.18 running in: konsole

inxi: 3.1.08

20: PCI 02.0: 0300 VGA compatible controller (VGA)
SysFS ID: /devices/pci0000:00/0000:00:02.0
SysFS BusID: 0000:00:02.0
Hardware Class: graphics card
Model: “Intel Skylake GT2 [HD Graphics 520]”
Vendor: pci 0x8086 “Intel Corporation”
Device: pci 0x1916 “Skylake GT2 [HD Graphics 520]”
SubVendor: pci 0x8086 “Intel Corporation”
SubDevice: pci 0x2212
Revision: 0x07
Driver: “i915”
Driver Modules: “i915”
Memory Range: 0xd0000000-0xd0ffffff (rw,non-prefetchable)
Memory Range: 0xc0000000-0xcfffffff (ro,non-prefetchable)
I/O Ports: 0x1c00-0x1c3f (rw)
Memory Range: 0x000c0000-0x000dffff (rw,non-prefetchable,disabled)
IRQ: 131 (152369 events)
I/O Port: 0x00 (rw)
Module Alias: “pci:v00008086d00001916sv00008086sd00002212bc03sc00i00”
Driver Info #0:
Driver Status: i915 is active
Driver Activation Cmd: “modprobe i915”