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[Bug 1371425] [NEW] linux-firmware 1.127.5, 1.127.6 causes instable network connection (likely due to iwlwifi-7260-8.ucode)


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1) Linux Mint 17 Qiana (MATE, x86_64)
2) Having linux-firmware 1.127.5 or 1.127.6 installed on my Sony Vaio Pro 13 ( SVP1322V8EBI product name )
3) It causes loosy network, ping to wireless access point is unstable, it jumps from 1.8ms up to 250 and even more than 2000ms from time to time (every 3-5 minutes), repeatedly dropping packets too (no matter pinging directly a router or an external site), consistently high packet loss (about 33%), impossible to work over ssh as it takes about 10-15 seconds to type a command almost every 3rd or 5th minute, repeatedly disconnects from access point due to a limited range.
4) Normal and stable network connection over WiFi -- without lags, packet loss, disruptions, limited range, etc ...
5) Always with linux-firmware 1.127.5 or 1.127.6

--- Notes ---
And there is absoultely no problem when I downgraded to linux-firmware=1.127.4 , wireless connection perfectly works, no lags, no disruptions, no packet loss, just works as expected.

My Wireless card on Sony Vaio Pro 13:
01:00.0 Network controller: Intel Corporation Wireless 7260 (rev 6b)
	Subsystem: Intel Corporation Dual Band Wireless-AC 7260
	Flags: bus master, fast devsel, latency 0, IRQ 60
	Memory at f7200000 (64-bit, non-prefetchable) [size=8K]
	Capabilities: [c8] Power Management version 3
	Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [40] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Device Serial Number 5c-51-4f-ff-ff-XX-XX-XX  (NOTE: I changed last 3 bytes to XX)
	Capabilities: [14c] Latency Tolerance Reporting
	Capabilities: [154] Vendor Specific Information: ID=cafe Rev=1 Len=014 <?>
	Kernel driver in use: iwlwifi

Thanks for fixing this problem in advnace, and if you need more outputs
from my side, please let me know.

** Affects: linux-firmware (Ubuntu)
     Importance: Undecided
         Status: New

** Tags: 7260 bug disconnect disruption iwlwifi network sony vaio wifi wireless
linux-firmware 1.127.5, 1.127.6 causes instable network connection (likely due to iwlwifi-7260-8.ucode)
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