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<base href="https://bugs.freedesktop.org/">
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Display issues while kernel boots. Narrow horizontal screen distortion while scrolling."
href="https://bugs.freedesktop.org/show_bug.cgi?id=97871">97871</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Display issues while kernel boots. Narrow horizontal screen distortion while scrolling.
</td>
</tr>
<tr>
<th>Product</th>
<td>DRI
</td>
</tr>
<tr>
<th>Version</th>
<td>XOrg git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>DRM/Intel
</td>
</tr>
<tr>
<th>Assignee</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>edbarx@gmail.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr>
<tr>
<th>CC</th>
<td>intel-gfx-bugs@lists.freedesktop.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=126646" name="attach_126646" title="dmesg output with kernel parameter "drm.debug=14".">attachment 126646</a> <a href="attachment.cgi?id=126646&action=edit" title="dmesg output with kernel parameter "drm.debug=14".">[details]</a></span>
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.
<span class="quote">>></span >
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</pre>
</div>
</p>
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