Created attachment 126646 [details] dmesg output with kernel parameter "drm.debug=14". During boot kernel warns with: << Sep 18 06:58:03 edbarx-pc3 kernel: [ 7.471266] [drm] Wrong MCH_SSKPD value: 0x16040307 Sep 18 06:58:03 edbarx-pc3 kernel: [ 7.471269] [drm] This can cause pipe underruns and display issues. Sep 18 06:58:03 edbarx-pc3 kernel: [ 7.471270] [drm] Please upgrade your BIOS to fix this. >> On kernel boot, text is unreadable with pixel lines shifted to left by a constant number of pixels. This persists until user console settings take over as I have to use bigger than normal fonts. While scrolling in Firefox a horizontal narrow line is distorted. System: HP Probook 4540s CPU: i5 RAM: 4GB OS: Debian/Devuan OS Details: Linux edbarx-pc3 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 (2016-09-03) x86_64 GNU/Linux GPU: 00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) Modules in use: Module Size Used by ctr 12927 1 ccm 17577 1 bnep 17431 2 pci_stub 12429 1 vboxpci 23077 0 vboxnetadp 25443 0 vboxnetflt 27598 0 vboxdrv 344446 3 vboxnetadp,vboxnetflt,vboxpci nfsd 262938 2 auth_rpcgss 51209 1 nfsd oid_registry 12419 1 auth_rpcgss nfs_acl 12511 1 nfsd nfs 192232 0 lockd 83389 2 nfs,nfsd fscache 45542 1 nfs sunrpc 237364 6 nfs,nfsd,auth_rpcgss,lockd,nfs_acl fuse 83350 1 x86_pkg_temp_thermal 12951 0 ath3k 16781 0 intel_powerclamp 17159 0 intel_rapl 17356 0 ecb 12737 1 arc4 12536 2 ath9k 90245 0 snd_hda_codec_hdmi 45118 1 ath9k_common 21746 1 ath9k btusb 29721 0 coretemp 12820 0 kvm_intel 139116 0 bluetooth 374429 8 bnep,ath3k,btusb kvm 392862 1 kvm_intel ath9k_hw 391172 2 ath9k_common,ath9k snd_hda_codec_idt 48946 1 snd_hda_codec_generic 63181 1 snd_hda_codec_idt 6lowpan_iphc 16588 1 bluetooth ath 26067 3 ath9k_common,ath9k,ath9k_hw crc32_pclmul 12915 0 aesni_intel 151423 3 mac80211 482315 1 ath9k aes_x86_64 16719 1 aesni_intel lrw 12757 1 aesni_intel gf128mul 12970 1 lrw glue_helper 12695 1 aesni_intel hp_wmi 13238 0 iTCO_wdt 12831 0 cfg80211 413730 4 ath,ath9k_common,ath9k,mac80211 ablk_helper 12572 1 aesni_intel iTCO_vendor_support 12649 1 iTCO_wdt ppdev 16782 0 sparse_keymap 12818 1 hp_wmi cryptd 14516 2 aesni_intel,ablk_helper rfkill 18867 5 cfg80211,hp_wmi,bluetooth joydev 17063 0 pcspkr 12595 0 evdev 17445 18 serio_raw 12849 0 efi_pstore 12805 1 snd_hda_intel 26407 1 snd_hda_controller 26646 1 snd_hda_intel snd_hda_codec 104500 5 snd_hda_codec_hdmi,snd_hda_codec_idt,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller snd_hwdep 13148 1 snd_hda_codec jmb38x_ms 17096 0 i915 841331 2 memstick 13696 1 jmb38x_ms efivars 17257 1 efi_pstore snd_pcm 88662 4 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller snd_timer 26668 1 snd_pcm snd 65338 10 snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_idt,snd_pcm,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel soundcore 13026 2 snd,snd_hda_codec drm_kms_helper 49210 1 i915 parport_pc 26300 0 lpc_ich 20768 0 mfd_core 12601 1 lpc_ich mei_me 17941 0 mei 74977 1 mei_me drm 249998 4 i915,drm_kms_helper wmi 17339 1 hp_wmi i2c_algo_bit 12751 1 i915 battery 13356 0 tpm_tis 17231 0 tpm 31511 1 tpm_tis parport 35749 2 ppdev,parport_pc i2c_core 46012 4 drm,i915,drm_kms_helper,i2c_algo_bit shpchp 31121 0 hp_accel 25200 0 video 18096 1 i915 hp_wireless 12491 0 button 12944 1 i915 lis3lv02d 17883 1 hp_accel input_polldev 13118 1 lis3lv02d processor 28221 0 ac 12715 0 ext4 477942 1 crc16 12343 2 ext4,bluetooth mbcache 17171 1 ext4 jbd2 82514 1 ext4 hid_generic 12393 0 usbhid 44460 0 hid 102264 2 hid_generic,usbhid sg 29973 0 sd_mod 44356 3 sr_mod 21903 0 crc_t10dif 12431 1 sd_mod cdrom 47424 1 sr_mod crct10dif_generic 12581 0 crct10dif_pclmul 13387 1 crct10dif_common 12356 3 crct10dif_pclmul,crct10dif_generic,crc_t10dif crc32c_intel 21809 0 psmouse 99249 0 ahci 33334 2 r8169 68262 0 libahci 27158 1 ahci mii 12675 1 r8169 sdhci_pci 22097 0 libata 177508 2 ahci,libahci scsi_mod 191405 4 sg,libata,sd_mod,sr_mod ehci_pci 12512 0 sdhci 35161 1 sdhci_pci xhci_hcd 152977 0 ehci_hcd 69837 1 ehci_pci mmc_core 102374 2 sdhci,sdhci_pci usbcore 195468 6 ath3k,btusb,ehci_hcd,ehci_pci,usbhid,xhci_hcd usb_common 12440 1 usbcore thermal 17559 0 thermal_sys 27642 5 video,intel_powerclamp,thermal,processor,x86_pkg_temp_thermal
(In reply to edbarx from comment #0) > OS Details: Linux edbarx-pc3 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u1 That's old. Please reopen if you see the problem with v4.7 or later.
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